Uraemic
U•rae´mic, a. (Med.) Of or pertaining to uraemia; as uraemic convulsions.
Ural
U´ral, a. Pertaining to, or designating, the Urals, a mountain range between Europe and Asia.
Urali
U´ra•li, n. [See Wourali.] See Curare. { U•ra´li•an, U•ral´ic } a. Of or relating to the Ural Mountains.
Uralitization
U•ral•i•ti•za´tion, n. (Geol.) The change of pyroxene to amphibole by paramorphism.
Uranian
U•ra´ni•an, a. (Astron.) Of or pertaining to the planet Uranus; as the Uranian year.
Uranin
U´ra•nin, n. (Chem.) An alkaline salt of fluorescein, obtained as a brownish red substance, which is used as a dye; — so called from the peculiar yellowish green fluorescence (resembling that of uranium glass) of its solutions. See Fluorescein.
Uraniscoplasty
U•ra•nis´co•plas•ty, n. [Gr. top of a tent, plate (fr. sky) + -plasty.] (Surg.) The process of forming an artificial palate. { U•ra•nis•cor´a•phy, U•ra•nis•cor´rha•phy }, n. [Gr. the top of a tent, the palate (fr. sky) + a seam.] (Surg.) Suture of the palate. See Staphyloraphy.
Uranitic
U•ra•nit´ic, a. (Chem.) Of or pertaining to uranium; containing uranium.
Uranium
U•ra´ni•um, n. [NL., from Uranus the planet. See Uranus.] (Chem.) An element of the chromium group, found in certain rare minerals, as pitchblende, uranite, etc., and reduced as a heavy, hard, nickel-white metal which is quite permanent. Its yellow oxide is used to impart to glass a delicate greenish- yellow tint which is accompanied by a strong fluorescence, and its black oxide is used as a pigment in porcelain painting. Symbol U. Atomic weight 239. Uranium was discovered in the state of an oxide by Klaproth in 1789, and so named in honor of Herschel’s discovery of the planet Uranus in 1781. { U´ran-o•cher, U´ran-o•chre }, n. [Cf. F. uranochre.] (Min.) (a) A yellow, earthy incrustation, consisting essentially of the oxide of uranium, but more or less impure. { U•ra•no•graph´ic, U•ra•no•graph´ic•al } a. Of or pertaining to uranography; as an uranographic treatise.
Uranographist
U•ra•nog´ra•phist, n. One practiced in uranography.
Uranolite
U•ran´o•lite, n. [Gr. heaven + - lite.] A meteorite or aërolite. [Obs.] Hutton.
Uranoplasty
U´ra•no•plas•ty, n. [See Uraniscoplasty.] (Surg.) The plastic operation for closing a fissure in the hard palate.
Uranoscopy
U•ra•nos´co•py, n. [Gr. + - scopy.] Observation of the heavens or heavenly bodies.
Uranus
U´ra•nus (-nus), n. [L. Uranus, Gr. O’yrano•s Uranus, o’yrano•s heaven, sky. Cf. Uranium.]
1. (Gr. Myth.) The son or husband of Gaia (Earth), and father of Chronos (Time) and the Titans.
2. (Astron.) One of the primary planets. It is about 1,800,000,000 miles from the sun, about 36,000 miles in diameter, and its period of revolution round the sun is nearly 84 of our years. This planet has also been called Herschel, from Sir William Herschel, who discovered it in 1781, and who named it Georgium Sidus, in honor of George III., then King of England.
Urao
U•ra´o, n. [Sp.] (Min.) See Trona. { U•ra´re, U•ra´ri }, n. See Curare.
Uratic
U•rat´ic, (Physiol. Chem.) Of or containing urates; as uratic calculi.
Urban
Ur´ban, a. [L. urbanus belonging to the ity or town, refined, polished, fr. urbs, urbis, a city: cf. F. urbain. Cf. Urbane.]
1. Of or belonging to a city or town; as an urban population.
2. Belonging to, or suiting, those living in a city; cultivated; polite; urbane; as urban manners. Urban servitude. See Predial servitude, under Servitude.
Urbane
Ur•bane´, a. [See Urban.] Courteous in manners; polite; refined; elegant.
Urbaniste
Ur´ban•iste, n. (Bot.) A large and delicious pear or Flemish origin.
Urbanize
Ur´ban•ize, v. t. To render urban, or urbane; to refine; to polish. Howell.
Urbicolous
Ur•bic´o•lous, a. Of or pertaining to a city; urban. [R.]
Urceole
Ur´ce•ole, n. [See Urceolate.] (R. C. Ch.) A vessel for water for washing the hands; also one to hold wine or water.
Urchin
Ur´chin (û"chin), n. [OE. urchon, irchon, a hedgehog, OF. ireçon, eriçon, heriçon, herichon, F. herisson, a derivative fr. L. ericius, from er a hedgehog, for her; akin to Gr. chh•r. Cf. Herisson.]
1. (Zoöl.) A hedgehog.
2. (Zoöl.) A sea urchin. See Sea urchin.
3. A mischievous elf supposed sometimes to take the form a hedgehog. "We ’ll dress [them] like urchins, ouphes, and fairies." Shak.
4. A pert or roguish child; — now commonly used only of a boy.
"And the urchins that stand with their thievish eyes
Forever on watch ran off each with a prize." W. Howitt.
"You did indeed dissemble, you urchin you; but where’s the girl that won’t dissemble for an husband?" Goldsmith.
5. One of a pair in a series of small card cylinders, arranged around a carding drum; — so called from its fancied resemblance to the hedgehog. Knight. Urchin fish (Zoöl.), a diodon.
Urchin
Ur´chin, a. Rough; pricking; piercing. [R.] "Helping all urchin blasts." Milton.
Urdu
Ur´du, n. [Hind. urdu.] The language more generally called Hindustanee.
Ure, n. [OE. ure, OF. oevre, ovre, ouvre, work, F. œuvre, L. opera. See Opera, Operate, and cf. Inure, Manure.] Use; practice; exercise. [Obs.] Fuller.
"Let us be sure of this, to put the best in ure
That lies in us." Chapman.
Urea
U´re•a, a. [NL. See Urine.] (Physiol. Chem.) A very soluble crystalline body which is the chief constituent of the urine in mammals and some other animals. It is also present in small quantity in blood, serous fluids, lymph, the liver, etc. It is the main product of the regressive metamorphosis (katabolism) of proteid matter in the body, and is excreted daily to the amount of about 500 grains by a man of average weight. Chemically it is carbamide, CO(NH2)2, and when heated with strong acids or alkalies is decomposed into carbonic acid and ammonia. It unites with acids to form salts, as nitrate of urea, and it can be made synthetically from ammonium cyanate, with which it is isomeric. Urea ferment, a soluble ferment formed by certain bacteria, which, however, yield the ferment from the body of their cells only after they have been killed by alcohol. It causes urea to take up water and decompose into carbonic acid and ammonia. Many different bacteria possess this property, especially Bacterium ureae and Micrococcus ureae, which are found abundantly in urines undergoing alkaline fermentation.
Ureal
U´re•al, a. Of or pertaining to urea; containing, or consisting of, urea; as ureal deposits.
Uredo
U•re´do, n. [L., a blast, blight, a burning itch, fr. urere to burn, to scorch.]
1. (Bot.) One of the stages in the life history of certain rusts ( Uredinales), regarded at one time as a distinct genus. It is a summer stage preceding the teleutospore, or winter stage. See Uredinales, in the Supplement.
2. (Med.) Nettle rash. See Urticaria.
Uredospore
U•re´do•spore, n. (Bot.) The thin-walled summer spore which is produced during the so-called Uredo stage of certain rusts. See (in the Supplement) Uredinales, Heterœcious, etc.
Ureter
U•re´ter ( 277), n. [NL., fr. Gr. . See Urine.] (Anat.) The duct which conveys the urine from the kidney to the bladder or cloaca. There are two ureters, one for each kidney.
Ureteritis
U•re•ter•i´tis, n. [NL. See Ureter, and -itis.] (Med.) Inflammation of the ureter. Dunglison.
Urethane
U•reth´ane, n. [F. urethane. See Urea; Ether.] (Org. Chem.) A white crystalline substance, NH2.COOC2H5, produced by the action of ammonia on ethyl carbonate or by heating urea nitrate and ethyl alcohol. It is used as a hypnotic, antipyretic, and antispasmodic. Hence, any ester of carbamic acid.
Urethra
U•re´thra, n. [L., fr. Gr. . See Urine.] (Anat.) The canal by which the urine is conducted from the bladder and discharged.
Urethritis
U•re•thri´tis, n. [NL. See Urethra, and -itis.] (Med.) Inflammation of the urethra.
Urethroscopy
U•re•thros´co•py, n. (Med.) Examination of the urethra by means of the urethroscope.
Uretic
U•ret´ic, a. [L. ureticus, Gr. . See Urine.] (Med.) Of or pertaining to the urine; diuretic; urinary; as uretic medicine.
Urge, v. t. [ imp. & p. p. Urged p. pr. & vb. n. Urging ] [L. urgere; akin to E. wreak. See Wreak, v. t.]
1. To press; to push; to drive; to impel; to force onward.
"Through the thick deserts headlong urged his flight." Pope.
2. To press the mind or will of; to ply with motives, arguments, persuasion, or importunity.
"My brother never
Did urge me in his act; I did inquire it." Shak.
3. To provoke; to exasperate. [R.]
"Urge not my father’s anger." Shak.
4. To press hard upon; to follow closely
"Heir urges heir, like wave impelling wave." Pope.
5. To present in an urgent manner; to press upon attention; to insist upon; as to urge an argument; to urge the necessity of a case.
6. To treat with forcible means; to take severe or violent measures with; as to urge an ore with intense heat.
Syn. — To animate; incite; impel; instigate; stimulate; encourage.
Urge, v. i.
1. To press onward or forward. [R.]
2. To be pressing in argument; to insist; to persist.
Urgent
Ur´gent, a. [L. urgens, p. pr. of urgere: cf. F. urgent. See Urge.] Urging; pressing; besetting; plying, with importunity; calling for immediate attention; instantly important. "The urgent hour." Shak.
"Some urgent cause to ordain the contrary." Hooker.
"The Egyptians were urgent upon the people that they might send them out of the land in haste." Ex. xii. 33.
Uric
U´ric, a. [Gr. urine: cf. F. urique. See Urine.] (Physiol. Chem.) Of or pertaining to urine; obtained from urine; as uric acid. Uric acid, a crystalline body, present in small quantity in the urine of man and most mammals. Combined in the form of urate of ammonia, it is the chief constituent of the urine of birds and reptiles, forming the white part. Traces of it are also found in the various organs of the body. It is likewise a common constituent, either as the free acid or as a urate, of urinary or renal calculi and of the so- called gouty concretions. From acid urines, uric acid is frequently deposited, on standing in a cool place, in the form of a reddish yellow sediment, nearly always crystalline. Chemically, it is composed of carbon, hydrogen, nitrogen, and oxygen, C5H4N4O3, and by decomposition yields urea, among other products. It can be made synthetically by heating together urea and glycocoll. It was formerly called also lithic acid, in allusion to its occurrence in stone, or calculus.
Urinarium
U•ri•na´ri•um, n. [LL. urinarium.] (Agric.) A reservoir for urine, etc., for manure.
Urinate
U´ri•nate, v. i. [LL. urinare.] To discharge urine; to make water.
Urination
U•ri•na´tion, n. The act or process of voiding urine; micturition.
Urinative
U´ri•na•tive, a. Provoking the flow of urine; uretic; diuretic. [R.] Bacon.
Urinometry
U•ri•nom´e•try, n. The estimation of the specific gravity of urine by the urinometer. { U´ri•nose, U´ri•nous } a. [Cf. F. urineux. See Urine.] Of or pertaining to urine, or partaking of its qualities; having the character or odor of urine; similar to urine. Arbuthnot.
Urith
U´rith, n. The bindings of a hedge. [Obs. or Prov. Eng.] Halliwell.
Urn, n. [OE. urne, L. urna; perhaps fr. urere to burn, and sop called as being made of burnt clay (cf. East): cf. F. urne.]
1. A vessel of various forms, usually a vase furnished with a foot or pedestal, employed for different purposes, as for holding liquids, for ornamental uses, for preserving the ashes of the dead after cremation, and anciently for holding lots to be drawn.
"A rustic, digging in the ground by Padua, found an urn, or earthen pot, in which there was another urn." Bp. Wilkins.
"His scattered limbs with my dead body burn,
And once more join us in the pious urn." Dryden.
2. Fig.: Any place of burial; the grave.
"Or lay these bones in an unworthy urn,
Tombless, with no remembrance over them." Shak.
3. (Rom. Antiq.) A measure of capacity for liquids, containing about three gallons and a haft, wine measure. It was haft the amphora, and four times the congius.
4. (Bot.) A hollow body shaped like an urn, in which the spores of mosses are contained; a spore case; a theca.
5. A tea urn. See under Tea. Urn mosses (Bot.), the order of true mosses; — so called because the capsules of many kinds are urn- shaped.
Urnful
Urn´ful, n. ; pl. Urnfuls . As much as an urn will hold; enough to fill an urn.
Urn-shaped
Urn´-shaped, a. Having the shape of an urn; as the urn-shaped capsules of some mosses.
Uro-
U´ro- A combining form fr. Gr. o’y^ron, urine.
Uro-
U´ro-. A combining form from Gr. o’yra•, the tail, the caudal extremity.
Urobilin
U•ro•bi´lin, n. [1st uro- + bile + -in.] (Physiol. Chem.) A yellow pigment identical with hydrobilirubin, abundant in the highly colored urine of fever, and also present in normal urine. See Urochrome.
Urocerata
U•ro•cer´a•ta, n. pl. [NL., fr. Gr. tail +,, horn.] (Zoöl.) A division of boring Hymenoptera, including Tremex and allied genera. See Illust. of Horntail.
Urochorda
U•ro•chor´da, n. pl. [NL. See Urochord.] (Zoöl.) Same as Tunicata.
Urochordal
U•ro•chor´dal, a. (Zoöl.) Of or pertaining to the Urochorda.
Urocyst
U´ro•cyst, n. [1st uro- + cyst.] (Anat.) The urinary bladder.
Urodelian
U•ro•de´li•an, a. (Zoöl.) Of or pertaining to the Urodela. — n. One of the Urodela.
Uroerythrin
U•ro•e•ryth´rin, n. [See 1st Uro-, and Erythrin.] (Physiol. Chem.) A reddish urinary pigment, considered as the substance which gives to the urine of rheumatism its characteristic color. It also causes the red color often seen in deposits of urates.
Urogenital
U•ro•gen´i•tal, a. [1st uro- + genital.] (Anat.) Same as Urinogenital.
Urohaematin
U•ro•haem´a•tin, n. [1st uro- + haematin.] (Physiol. Chem.) Urinary haematin; — applied to the normal coloring matter of the urine, on the supposition that it is formed either directly or indirectly (through bilirubin) from the haematin of the blood. See Urochrome, and Urobilin.
Urology
U•rol´o•gy, n. [1st uro- + - logy.] (Med.) See Uronology.
Uromere
U´ro•mere, n. [2d uro- + - mere.] (Zoöl.) Any one of the abdominal segments of an arthropod.
Uropod
U´ro•pod, n. [2d uro- + - pod.] (Zoöl.) Any one of the abdominal appendages of a crustacean, especially one of the posterior ones, which are often larger than the rest, and different in structure, and are used chiefly in locomotion. See Illust. of Crustacea, and Stomapoda.
Uropodal
U•rop´o•dal, a. (Zoöl.) Of or pertaining to a uropod.
Uropygial
U•ro•pyg´i•al, a. [See Uropygium.] (Anat.) Of or pertaining to the uropygium, or prominence at the base of the tail feathers, in birds. Uropygial gland, a peculiar sebaceous gland at the base of the tail feathers in most birds. It secretes an oily fluid which is spread over the feathers by preening.
Urosome
U´ro•some, n. [2d uro- + - some body.] (Zoöl.) The abdomen, or post-abdomen, of arthropods.
Urox
U´rox, n. [See Aurochs, and cf. Urus.] (Zoöl.) The aurochs.
Uroxanthin
U•ro•xan´thin, n. [1st uro- + xanthin.] (Physiol. Chem.) Same as Indican.
Ursa
Ur´sa, n. [L. ursa a she-bear, also a constellation, fem. of ursus a bear. Cf. Arctic.] (Astron.) Either one of the Bears. See the Phrases below. Ursa Major [L.], the Great Bear, one of the most conspicuous of the northern constellations. It is situated near the pole, and contains the stars which form the Dipper, or Charles’s Wain, two of which are the Pointers, or stars which point towards the North Star. — Ursa Minor [L.], the Little Bear, the constellation nearest the north pole. It contains the north star, or polestar, which is situated in the extremity of the tail.
Ursal
Ur´sal, n. (Zoöl.) The ursine seal. See the Note under 1st Seal.
Ursiform
Ur´si•form, a. [L. ursus, ursa, a bear + -form.] Having the shape of a bear.
Ursine
Ur´sine, a. [L. ursinus, from ursus a bear. See Ursa.] Of or pertaining to a bear; resembling a bear. Ursine baboon. (Zoöl.) See Chacma. — Ursine dasyure (Zoöl.), the Tasmanian devil. — Ursine howler (Zoöl.), the araguato. See Illust. under Howler. — Ursine seal. (Zoöl.) See Sea bear, and the Note under 1st Seal.
Urson
Ur´son, n. [Cf. Urchin.] (Zoöl.) The Canada porcupine. See Porcupine.
Ursus
Ur´sus, n. [L., a bear.] (Zoöl.) A genus of Carnivora including the common bears.
Urtica
Ur•ti´ca, n. [L., a nettle.] (Bot.) A genus of plants including the common nettles. See Nettle, n.
Urticaria
Ur•ti•ca´ri•a, n. [NL. See Urtica.] (Med.) The nettle rash, a disease characterized by a transient eruption of red pimples and of wheals, accompanied with a burning or stinging sensation and with itching; uredo.
Urticate
Ur´ti•cate, v. t. & i. [ imp. & p. p. Urticated p. pr. & vb. n. Urticating.] To sting with, or as with, nettles; to irritate; to annoy. G. A. Sala.
Urubu
U•ru•bu´, n. [Cf. Pg. urubú a certain Brazilian bird.] (Zoöl.) The black vulture ( Catharista atrata). It ranges from the Southern United States to South America. See Vulture.
Urus
U´rus, n. [L.; of Teutonic origin. See Aurochs.] (Zoöl.) A very large, powerful, and savage extinct bovine animal ( Bos urus or primigenius) anciently abundant in Europe. It appears to have still existed in the time of Julius Caesar. It had very large horns, and was hardly capable of domestication. Called also ur, ure, and tur.