Isabella grape
Is•a•bel"la grape (Bot.) A favorite sweet American grape of a purple color. See Fox grape, under Fox.

Isabella moth
Is•a•bel"la moth ( 115). (Zoöl.) A common American moth ( Pyrrharctia isabella), of an isabella color. The larva, called woolly bear and hedgehog caterpillar, is densely covered with hairs, which are black at each end of the body, and red in the middle part.

Isabelline
Is•a•bel´line, a. Of an isabel or isabella color.

Isagelous
Is•ag´e•lous (is•ag"e•lus), a. [ Is- + Gr. a•gelos information.] Containing the same information; as isagelous sentences. "The coded message and the original, though appearing entirely unlike, are completely isagelous." Bacon "The complementary strands have isagelous sequences." J. D. Watson. — Is´a•gel n. One of two or more objects containing the same information.

Isagoge
I´sa•goge, n. [L., fr. Fr., fr. to introduce; into + to lead.] An introduction. [Obs.] Harris. { I´sa•gog´ic, I´sa•gog´ic•al } a. [L. isagogicus, Gr. .] Introductory; especially, introductory to the study of theology.

Isagogics
I´sa•gog´ics, n. (Theol.) That part of theological science directly preliminary to actual exegesis, or interpretation of the Scriptures.

Isagon
I´sa•gon (i"sa•gon), n. [Gr. ’i•sos equal + gwni•a angle: cf. F. isagone, a. ] (Math.) A figure or polygon whose angles are equal.

Isapostolic
Is•ap•os•tol´ic, a. [Gr. .] Having equal, or almost equal, authority with the apostles of their teachings. { I•sat´ic, I•sa•tin´ic } a. (Chem.) Pertaining to, or derived from, isatin; as isatic acid, which is also called trioxindol.

Isatide
I´sa•tide, n. (Chem.) A white crystalline substance obtained by the partial reduction of isatin. [Written also isatyde.]

Isatin
I´sa•tin, n. [See Isatis.] (Chem.) An orange-red crystalline substance, C₈H₅NO₂, obtained by the oxidation of indigo blue. It is also produced from certain derivatives of benzoic acid, and is one important source of artificial indigo. [Written also less properly, isatine.]

Isatogen
I•sat´o•gen, n. [ Isatin + -gen.] (Chem.) A complex nitrogenous radical, C₈H₄NO₂, regarded as the essential residue of a series of compounds, related to isatin, which easily pass by reduction to indigo blue. — I•sat•o•gen´ic (#), a.

Isatropic
I•sa•trop´ic, a. [ Is- + atropine.] (Chem.) Pertaining to, or designating, an acid obtained from atropine, and isomeric with cinnamic acid.

Ischiac
Is´chi•ac (is"ki•ak), a. (Anat.) See Ischial.

Ischiatic
Is•chi•at´ic (is•ki•ad"ik), a. (Anat.) Same as Ischial.

Ischiocerite
Is•chi•o•ce´rite, n. [Gr. ’ischi•on the hip + ke•ras a horn.] (Zoöl.) The third joint or the antennae of the Crustacea. { Is´chi•on, Is´chi•um } n. [L., Gr. ’ischi•on.]
1. (Anat.) The ventral and posterior of the three principal bones composing either half of the pelvis; seat bone; the huckle bone.
2. (Zoöl.) One of the pleurae of insects.

Ischiopodite
Is•chi•op´o•dite, n. [Gr. ’ischi•on the hip joint +,, foot.] (Zoöl.) The third joint of the typical appendages of Crustacea.

Ischiorectal
Is•chi•o•rec´tal, a. [ Ischium + rectal.] (Anat.) Of or pertaining to the region between the rectum and ishial tuberosity.

Ischuretic
Is•chu•ret´ic, a. Having the quality of relieving ischury. — n. An ischuretic medicine.

Ischury
Is´chu•ry, n. [L. ischuria, Gr. ; to hold, check + urine: cf. F. ischurie.] (Med.) A retention or suppression of urine.

Isentropic
I•sen•trop´ic, a. [ Is- + entropy + -ic.] (Physics) Having equal entropy. Isentropic lines, lines which pass through points having equal entropy.

Isethionic
I•seth•i•on´ic, a. [ Is- + ethionic.] (Chem.) Pertaining to, derived from, or designating, an acid, HO.C₂H₄.SO₃H, obtained as an oily or crystalline substance, by the action of sulphur trioxide on alcohol or ether. It is derivative of sulphuric acid.

Ishmaelite
Ish´ma•el•ite, n.
1. A descendant of Ishmael (the son of Abraham and Hagar), of whom it was said, "His hand will be against every man, and every man’s hand against him." Gen. xvi. 12.
2. One at enmity with society; a wanderer; a vagabond; an outcast. Thackeray.
3. See Ismaelian.

Isiac
I´si•ac, a. [L. Isiacus, Gr., fr. .] Pertaining to the goddess Isis; as Isiac mysteries.

Isicle
I´si•cle, n. A icicle. [Obs.]

Isidorian
Is•i•do´ri•an, a. Pertaining, or ascribed, to Isidore; as the Isidorian decretals, a spurious collection of decretals published in the ninth century.

Isinglass
I´sin•glass, n. [Prob. corrupted fr. D. huizenblas (akin to G. hausenblase), lit., bladder of the huso, or large sturgeon; huizen sturgeon + blas bladder. Cf. Bladder, Blast a gust of wind.]
1. A semitransparent, whitish, and very pure form of gelatin, chiefly prepared from the sounds or air bladders of various species of sturgeons (as the Acipenser huso) found in the rivers of Western Russia. It used for making jellies, as a clarifier, etc. Cheaper forms of gelatin are not unfrequently so called. Called also fish glue.
2. (Min.) A popular name for mica, especially when in thin sheets.

Islamite
Is´lam•ite, n. A Mohammedan.

Islamitic
Is•lam•it´ic, a. Of or pertaining to Islam; Mohammedan.

Islamize
Is´lam•ize, v. i. & t. [ imp. & p. p. Islamized p. pr. & vb. n. Islamizing ] To conform, or cause to conform, to the religion of Islam.

Islander
Is´land•er, n. An inhabitant of an island.

Islandy
Is´land•y, a. Of or pertaining to islands; full of islands. Cotgrave.

Isle, n. [ Obs.] See Aisle.

Isle, n. [OF. isle, F. île, L. insula; cf. Lith. sala. Cf. Insulate.]
1. An island. [Poetic]
"Imperial rule of all the seagirt isles." Milton.
2. (Zoöl.) A spot within another of a different color, as upon the wings of some insects.

Isle, v. t. To cause to become an island, or like an island; to surround or encompass; to island. [Poetic]
"Isled in sudden seas of light." Tennyson.

Islet
Is´let, n. [OF. islette (cf. F. îlot), dim. of isle.] A little island.

Ism, n. [See ism, above.] A doctrine or theory; especially, a wild or visionary theory. E. Everett.
"The world grew light-headed, and forth came a spawn of isms which no man can number." S. G. Goodrich. { Is•ma•e´li•an, Is´ma•el•ite } n. (Eccl.) One of a sect of Mohammedans who favored the pretensions of the family of Mohammed ben Ismael, of the house of Ali. { I´so-, Is- } [Gr. ’i•sos equal.] A prefix or combining form, indicating identity, or equality; the same numerical value; as in isopod, isomorphous, isochromatic. Specif.: (a) (Chem.) Applied to certain compounds having the same composition but different properties; as in isocyanic. (b) (Organic Chem.) Applied to compounds of certain isomeric series in whose structure one carbon atom, at least, is connected with three other carbon atoms; — contrasted with neo- and normal; as in isoparaffine; isopentane.

Isobaric
I•so•bar´ic, a. (Phys. Geog.) Denoting equal pressure; as an isobaric line; specifically, of or pertaining to isobars.

Isobarism
I´so•bar•ism, n. The quality or state of being equal in weight, especially in atmospheric pressure. also the theory, method, or application of isobaric science.

Isobarometric
I•so•bar•o•met´ric, a. [ Iso + barometric.] (Phys. Geog.) Indicating equal barometric pressure.

Isobathytherm
I•so•bath´y•therm, n. [ Iso- + Gr. deep + heat.] (Phys. Geog.) A line connecting the points on the surface of the earth where a certain temperature is found at the same depth.

Isobathythermic
I•so•bath´y•ther´mic, a. Of or pertaining to an isobathytherm; possessing or indicating the same temperature at the same depth.

Isobront
I´so•bront (i"so•bront), n. [ Iso- + Gr. bronth• thunder.] (Meteor.) An imaginary line, or a line on a chart, marking the simultaneous development of a thunderstorm, as noted by observing the time when the thunder is heard at different places.

Isocephalism
I•so•ceph´a•lism, n. [From Gr. like-headed. See Iso-, and Cephalon.] (Art) A peculiarity in the design of bas-relief by which the heads of human figures are kept at the same height from the ground, whether the personages are seated, standing, or mounted on horseback; — called also isokephaleia.

Isochasmic
I•so•chas´mic, a. Indicating equal auroral display; as an isochasmic line.

Isocheim
I´so•cheim (i"so•kim), n. [ Iso- + Gr.,, winter.] (Phys. Geog.) A line connecting places on the earth having the same mean winter temperature. Cf. Isothere. { I•so•chei´mal, I•so•chi´mal }, a. Pertaining to, having the nature of, or making, isocheims; as an isocheimal line; an isocheimal chart. { I•so•chei´me•nal, I•so•chi´me•nal } a. The same as Isocheimal.

Isochromatic
I•so•chro•mat´ic, a. [ Iso- + chromatic.] (Opt.) Having the same color; connecting parts having the same color, as lines drawn through certain points in experiments on the chromatic effects of polarized light in crystals.

Isochronal
I•soch´ro•nal, a. [See Isochronous.] Uniform in time; of equal time; performed in equal times; recurring at regular intervals; as isochronal vibrations or oscillations.

Isochronism
I•soch´ro•nism, n. The state or quality of being isochronous.

Isochronize
I•soch´ro•nize, v. t. [ imp. & p. p. -nized; p. pr. & vb. n. -nizing.] [See Isochronous.] To make, or tend to make (the motion of a moving body), uniform in rate of rotation, or in frequency of vibration.

Isocrymal
I•so•cry´mal, a. (Phys. Geog.) Pertaining to, having the nature of, or illustrating, an isocryme; as an isocrymal line; an isocrymal chart.

Isocryme
I´so•cryme, n. [ Iso- + Gr. cold.] (Phys. Geog.) A line connecting points on the earth’s surface having the same mean temperature in the coldest month of the year.

Isocrymic
I•so•crym´ic, a. Isocrymal.

Isocyanic
I•so•cy•an´ic, a. [ Iso- + cyanic.] (Chem.) Designating an acid isomeric with cyanic acid. Isocyanic acid, an acid metameric with cyanic acid, and resembling it in its salts. It is obtained as a colorless, mobile, unstable liquid by the heating cyanuric acid. Called technically carbimide.

Isocyanuric
I•so•cy•a•nu´ric, a. [ Iso- + cyanuric.] (Chem.) Designating, or pertaining to, an acid isomeric with cyanuric acid, and called also fulminuric acid. See under Fulminuric.

Isodimorphic
I•so•di•mor´phic, a. [ Iso- + dimorphic.] Isodimorphous.

Isodimorphism
I•so•di•mor´phism, n. Isomorphism between the two forms severally of two dimorphous substances.

Isodimorphous
I•so•di•mor´phous, a. [ Iso- + dimorphous.] Having the quality of isodimorphism.

Isodrome
I´so•drome, n. [ Iso- + Gr. course.] (Nav.) A method of moving a fleet from one formation to another, the direction usually being changed eight points (90°), by means of paths of equal length for each ship. It is prohibited in the United States navy.

Isodulcite
I•so•dul´cite, n. [ Iso- + dulcite.] (Chem.) A white, crystalline, sugarlike substance, obtained by the decomposition of certain glucosides, and intermediate in nature between the hexacid alcohols ( dulcite, mannite, etc.) and the glucoses.

Isodynamic
I•so•dy•nam´ic, a. [ Iso- + dynamic.] Of, pertaining to, having, or denoting, equality of force. Isodynamic foods (Physiol.), those foods that produce a similar amount of heat. — Isodynamic lines (Magnetism), lines on the earth’s surface connecting places at which the magnetic intensity is the same.

Isodynamous
I•so•dy´na•mous, a. [Gr. . See Isodynamic.] Of equal force or size.

Isogonic
I•so•gon´ic, a. [ Iso- + Gr. gwni•a angle.] Pertaining to, or noting, equal angles. Isogonic lines (Magnetism), lines traced on the surface of the globe, or upon a chart, connecting places at which the deviation of the magnetic needle from the meridian or true north is the same.

Isogonic
I•so•gon´ic, a. (Zoöl.) Characterized by isogonism.

Isogonism
I•sog´o•nism, n. [ Iso- + Gr. offspring, generative parts.] (Zoöl.) The quality of having similar sexual zooids or gonophores and dissimilar hydrants; — said of certain hydroids.

Isographic
I•so•graph´ic, a. Of or pertaining to isography.

Isography
I•sog´ra•phy, n. [ Iso- + -graphy.] Imitation of another’s handwriting.

Isohyetose
I•so•hy´e•tose, a. [ Iso- + Gr. "yeto•s rain.] (Phys. Geog.) Of or pertaining to lines connecting places on the earth’s surface which have a mean annual rainfall. — n. An isohyetose line.

Isolable
I´so•la•ble, a. [See Isolate.] (Chem.) Capable of being isolated, or of being obtained in a pure state; as gold is isolable.

Isolation
I•so•la´tion (-la"shun), n. [Cf. F. isolation.] The act of isolating, or the state of being isolated; insulation; separation; loneliness. Milman.

Isolator
I´so•la•tor (i"so•la•ter or is"o•la•ter), n. One who, or that which, isolates.

Isologous
I•sol´o•gous, a. [ Iso- + Gr. lo•gos proportion.] (Chem.) Having similar proportions, similar relations, or similar differences of composition; — said specifically of groups or series which differ by a constant difference; as ethane, ethylene, and acetylene, or their analogous compounds, form an isologous series.

Isomer
I´so•mer (i"so•mer), n. [See Isomeric.] (Chem.) A body or compound which is isomeric with another body or compound; a member of an isomeric series.

Isomerism
I•som´er•ism, n. (Chem.) The state, quality, or relation, of two or more isomeric substances. Physical isomerism (Chem.), the condition or relation of certain ( metameric) substances, which, while chemically identical (in that they have the same composition, the same molecular weights, and the same ultimate constitution), are yet physically different, as in their action on polarized light, as dextro- and laevo-tartaric acids. In such compounds there is usually at least one unsymmetrical carbon atom. See Unsymmetrical.

Isomorphic
I•so•mor´phic, a. Isomorphous.

Isomorphic
I•so•mor´phic, a. (Biol.) Alike in form; exhibiting isomorphism.

Isomorphism
I•so•mor´phism, n. [Cf. F. isomorphisme.] (Crystallog.) A similarity of crystalline form between substances of similar composition, as between the sulphates of barium (BaSO₄) and strontium (SrSO₄). It is sometimes extended to include similarity of form between substances of unlike composition, which is more properly called homœomorphism.

Isomorphous
I•so•mor´phous, a. [ Iso- + -morphous.] Having the quality of isomorphism.

Isonandra
I•so•nan´dra, n. [ Iso- + Gr.,, a man, male.] (Bot.) A genus of sapotaceous trees of India. Isonandra Gutta is the principal source of gutta-percha.

Isonephelic
I•so•ne•phel´ic, a. [ Iso- + Gr. a cloud.] (Phys. Geog.) Having, or indicating, an equal amount of cloudiness for a given period; as isonephelic regions; an isonephelic line.

Isonicotine
I•so•nic´o•tine, n. [ Iso- + nicotine.] (Chem.) A crystalline, nitrogenous base, C₁₀H₁₄N₂, isomeric with nicotine.

Isonicotinic
I•so•nic•o•tin´ic, a. (Chem.) (a) Pertaining to, or derived from, isonicotine. (b) Pertaining to, or designating, an acid isomeric with nicotinic acid.

Isonitroso-
I•so•ni•tro´so- [ Iso- + nitroso-.] (Chem.) A combining form (also used adjectively), signifying: Pertaining to, or designating, the characteristic, nitrogenous radical, NOH, called the isonitroso group.

Isonomic
I•so•nom´ic, a. [Gr. ; equal + no•mos law.] The same, or equal, in law or right; one in kind or origin; analogous; similar. Dana.

Isonomy
I•son´o•my, n. [Gr. : cf. F. isonomie. See Isonomic.] Equal law or right; equal distribution of rights and privileges; similarity.

Isopepsin
I•so•pep´sin, n. [ Iso- + pepsin.] (Physiol. Chem.) Pepsin modified by exposure to a temperature of from 40° to 60° C.

Isoperimetrical
I•so•per•i•met´ric•al, a. [Gr. ; equal + circumference: cf. F. isoperimètre. See Perimeter.] (Geom.) Having equal perimeters of circumferences; as isoperimetrical figures or bodies.

Isopiestic
I•so•pi•es´tic, a. [ Iso- + Gr. to press.] (Thermodynamics) Having equal pressure. Isopiestic lines, lines showing, in a diagram, the relations of temperature and volume, when the elastic force is constant; — called also isobars.

Isopleura
I•so•pleu´ra, n. pl. [NL. See Iso-, and Pleura.] (Zoöl.) A subclass of Gastropoda, in which the body is symmetrical, the right and left sides being equal. The intestine terminates at the posterior end of the body, and the gills and circulatory and reproductive organs are paired. It includes the chitons ( Polyplacophora), together with Neomenia and Chaetoderma, which are wormlike forms without a shell.

Isopoda
I•sop´o•da, n. pl. [NL. See Iso-, and -poda.] (Zoöl.) An order of sessile-eyed Crustacea, usually having seven pairs of legs, which are all similar in structure. The body is usually depressed, with the abdominal segments short, and often consolidated in part. The branchiae are on the abdominal appendages. The group includes the terrestrial pill bugs and sow bugs, with numerous marine forms. See Arthrostrata, Gribble.

Isopodous
I•sop´o•dous, a. Same as Isopod.

Isoprene
I´so•prene, n. [Etymol. uncertain.] (Chem.) An oily, volatile hydrocarbon, obtained by the distillation of caoutchouc or gutta-percha.

Isopycnic
I•so•pyc´nic, a. [ Iso- + Gr. pykno•s dense.] (Physics) Having equal density, as different regions of a medium; passing through points at which the density is equal; as an isopycnic line or surface.

Isopycnic
I•so•pyc´nic, n. (Physics) A line or surface passing through those points in a medium, at which the density is the same.

Isorcin
I•sor´cin, n. [ Iso- + orcin.] (Chem.) A crystalline hydrocarbon derivative, metameric with orcin, but produced artificially; — called also cresorcin.

Isorropic
I•sor•rop´ic, a. [Gr. ’iso•rropos in equipoise; ’i•sos equal + "roph• downward inclination or momentum.] Of equal value. Isorropic line (in a diagram) (Geom.), the locus of all the points for which a specified function has a constant value. Newcomb.

Isosceles
I•sos´ce•les, a. [L., fr. Gr. ; ’i•sos equal + leg.] (Geom.) Having two legs or sides that are equal; — said of a triangle.

Isospondyli
I•so•spon´dy•li, n. pl. [NL., fr. Gr. ’i•sos equal +,, a vertebra.] (Zoöl.) An extensive order of fishes, including the salmons, herrings, and many allied forms.

Isospondylous
I•so•spon´dy•lous, a. (Zoöl.) Of or pertaining to the Isospondyli; having the anterior vertebrae separate and normal.

Isospore
I´so•spore, n. (Biol.) (a) One of the spores produced by an isosporous organism. (b) A zygospore.

Isosporic
I•so•spor´ic, a. [ Iso- + Gr. fruit.] (Bot.) Producing but one kind of spore, as the ferns and Equiseta. Cf. Heterosporic.

Isostasy
I•sos´ta•sy, n. [See Iso-; Stasis.] The state or quality of being isostatic. Specif. (Geol.), general equilibrium in the earth’s crust, supposed to be maintained by the yielding or flow of rock material beneath the surface under gravitative stress. By the theory of isostasy each unit column of the earth, from surface to center, has approximately the same weight, and the continents stand higher than the ocean beds chiefly because the material of the crust has there less density.

Isostemonous
I•so•stem´o•nous, a. [ Iso- + Gr. sth•mwn thread.] (Bot.) Having exactly as many stamens as petals.

Isostemony
I•so•stem´o•ny, n. (Bot.) The quality or state of being isostemonous.

Isosulphocyanate
I•so•sul•pho•cy´a•nate, n. (Chem.) A salt of isosulphocyanic acid.

Isosulphocyanic
I•so•sul•pho•cy•an´ic, a. (Chem.) Pertaining to, or designating, an acid, HNCS, isomeric with sulphocyanic acid.

Isotheral
I•soth´er•al, a. Having the nature of an isothere; indicating the distribution of temperature by means of an isothere; as an isotheral chart or line.

Isothere
I´so•there, n. [ Iso- + Gr. summer, to heat.] (Phys. Geog.) A line connecting points on the earth’s surface having the same mean summer temperature.

Isotherm
I´so•therm, n. [ Iso- + Gr. heat, fr. hot.] (Phys. Geog.) A line connecting or marking points on the earth’s surface having the same temperature. This may be the temperature for a given time of observation, or the mean temperature for a year or other period. also a similar line based on the distribution of temperature in the ocean.

Isothermal
I•so•ther´mal, a. [Cf. F. isotherme.] (a) Relating to equality of temperature. (b) (Phys. Geog.) Having reference to the geographical distribution of temperature, as exhibited by means of isotherms; as an isothermal line; an isothermal chart. Isothermal line. (a) An isotherm. (b) A line drawn on a diagram of energy such that its ordinates represent the pressures of a substance corresponding to various volumes, while the absolute temperature is maintained at a constant value. — Isothermal zones, spaces on opposite sides of the equator having the same mean temperature, and bounded by corresponding isothermal lines.

Isothermobath
I•so•ther´mo•bath, n. [ Iso- + Gr. hot + depth.] (Phys. Geog) A line drawn through points of equal temperature in a vertical section of the ocean.

Isothermobathic
I•so•ther•mo•bath´ic, a. Of or pertaining to an isothermobath; possessing or indicating equal temperatures in a vertical section, as of the ocean.

Isotherombrose
I•soth•er•om´brose, n. [ Iso- + Gr. qe•ros summer + ’o•mbros rain.] (Phys. Geog) A line connecting or marking points on the earth’s surface, which have the same mean summer rainfall.

Isotonic
I•so•ton´ic, a. [ Iso- + tonic.] Having or indicating, equal tones, or tension. Isotonic system (Mus.), a system consisting of intervals, in which each concord is alike tempered, and in which there are twelve equal semitones.

Isotrimorphic
I•so•tri•mor´phic, a. Isotrimorphous.

Isotrimorphism
I•so•tri•mor´phism, n. [ Iso- + Gr. thrice + form.] Isomorphism between the three forms, severally, of two trimorphous substances.

Isotrimorphous
I•so•tri•mor´phous, a. Having the quality of isotrimorphism; isotrimorphic.

Isotropic
I•so•trop´ic, a. [ Iso- + Gr. a turning, fr. to turn.] (Physics) Having the same properties in all directions; specifically, equally elastic in all directions.

Isotropism
I•sot´ro•pism, n. Isotropy.

Isotropous
I•sot´ro•pous, a. Isotropic.

Isotropy
I•sot´ro•py, n. (Physics) Uniformity of physical properties in all directions in a body; absence of all kinds of polarity; specifically, equal elasticity in all directions.

Isouric
I•so•u´ric, a. [ Iso- + uric.] (Chem.) Pertaining to, or designating, a complex nitrogenous acid, isomeric with uric acid.

Israelite
Is´ra•el•ite, n. [L. Israëlites, Gr., fr.,, Israel, Heb. Yisral, i. e., champion of God; sarah to fight + l God.] A descendant of Israel, or Jacob; a Hebrew; a Jew. { Is•ra•el•it´ic, Is´ra•el•i•tish } a. Of or pertaining to Israel, or to the Israelites; Jewish; Hebrew.

Issuable
Is´su•a•ble, a. [From Issue.]
1. Leading to, producing, or relating to, an issue; capable of being made an issue at law. Burrill.
2. Lawful or suitable to be issued; as a writ issuable on these grounds. Issuable plea (Law), a plea to the merits, on which the adverse party may take issue and proceed to trial.

Issuance
Is´su•ance, n. The act of issuing, or giving out; as the issuance of an order; the issuance of rations, and the like.

Issuant
Is´su•ant, a. (Her.) Issuing or coming up; — a term used to express a charge or bearing rising or coming out of another.

Issue
Is´sue (ish"u), n. [OF. issue, eissue, F. issue, fr. OF. issir, eissir, to go out, L. exire; ex out of, from + ire to go, akin to Gr. ’ie•nai, Skr. i, Goth. iddja went, used as prefect of gaggan to go. Cf. Ambition, Count a nobleman, Commence, Errant, Exit, Eyre, Initial, Yede went.]
1. The act of passing or flowing out; a moving out from any inclosed place; egress; as the issue of water from a pipe, of blood from a wound, of air from a bellows, of people from a house.
2. The act of sending out, or causing to go forth; delivery; issuance; as the issue of an order from a commanding officer; the issue of money from a treasury.
3. That which passes, flows, or is sent out; the whole quantity sent forth or emitted at one time; as an issue of bank notes; the daily issue of a newspaper.
4. Progeny; a child or children; offspring. In law, sometimes, in a general sense, all persons descended from a common ancestor; all lineal descendants.
"If the king Should without issue die." Shak.
5. Produce of the earth, or profits of land, tenements, or other property; as A conveyed to B all his right for a term of years, with all the issues, rents, and profits.
6. A discharge of flux, as of blood. Matt. ix. 20.
7. (Med.) An artificial ulcer, usually made in the fleshy part of the arm or leg, to produce the secretion and discharge of pus for the relief of some affected part.
8. The final outcome or result; upshot; conclusion; event; hence, contest; test; trial.
"Come forth to view The issue of the exploit." Shak.
"While it is hot, I ’ll put it to the issue." Shak.
9. A point in debate or controversy on which the parties take affirmative and negative positions; a presentation of alternatives between which to choose or decide.
10. (Law) In pleading, a single material point of law or fact depending in the suit, which, being affirmed on the one side and denied on the other, is presented for determination. See General issue, under General, and Feigned issue, under Feigned. Blount. Cowell.At issue, in controversy; disputed; opposing or contesting; hence, at variance; disagreeing; inconsistent.
"As much at issue with the summer day As if you brought a candle out of doors." Mrs. Browning. — Bank of issue, Collateral issue, etc. See under Bank, Collateral, etc. — Issue pea, a pea, or a similar round body, used to maintain irritation in a wound, and promote the secretion and discharge of pus. — To join, or take, issue, to take opposing sides in a matter in controversy.

Issue
Is´sue, v. i. [ imp. & p. p. Issued (ish"ud); p. pr. & vb. n. Issuing.]
1. To pass or flow out; to run out, as from any inclosed place.
"From it issued forced drops of blood." Shak.
2. To go out; to rush out; to sally forth; as troops issued from the town, and attacked the besiegers.
3. To proceed, as from a source; as water issues from springs; light issues from the sun.
4. To proceed, as progeny; to be derived; to be descended; to spring.
"Of thy sons that shall issue from thee." 2 Kings xx. 18.
5. To extend; to pass or open; as the path issues into the highway.
6. To be produced as an effect or result; to grow or accrue; to arise; to proceed; as rents and profits issuing from land, tenements, or a capital stock.
7. To close; to end; to terminate; to turn out; as we know not how the cause will issue.
8. (Law) In pleading, to come to a point in fact or law, on which the parties join issue.

Issue
Is´sue (ish"u), v. t.
1. To send out; to put into circulation; as to issue notes from a bank.
2. To deliver for use; as to issue provisions.
3. To send out officially; to deliver by authority; as to issue an order; to issue a writ.

Issueless
Is´sue•less, a. Having no issue or progeny; childless. "The heavens … have left me issueless." Shak.

Issuer
Is´su•er, n. One who issues, emits, or publishes.

Isthmian
Isth´mi•an, a. [L. Isthmius, Gr. . See Isthmus.] Of or pertaining to an isthmus, especially to the Isthmus of Corinth, in Greece. Isthmian games (Gr. Antiq.), one of the four great national festivals of Greece, celebrated on the Isthmus of Corinth in the spring of every alternate year. They consisted of all kinds of athletic sports, wrestling, boxing, racing on foot and in chariots, and also contests in music and poetry. The prize was a garland of pine leaves.