Cnemial
Cne´mi•al, a. [Gr. the tibia.] (Anat.) Pertaining to the shin bone. Cnemial crest, a crestlike prominence on the proximal end of the tibia of birds and some reptiles.

Cnida
Cni´da (ni"da), n. ; pl. Cnidae (ni"de). [NL., fr. Gr. kni•dh nettle, sea nettle.] (Zoöl.) One of the peculiar stinging cells found in Cœlenterata; a nematocyst; a lasso cell.

Cnidaria
Cni•da´ri•a (ni•da"ri•a), n. pl. [NL. See Cnida.] (Zoöl.) A comprehensive group equivalent to the true Cœlenterata, i. e., exclusive of the sponges. They are so named from presence of stinging cells ( cnidae) in the tissues. See Coelenterata.

Cnidoblast
Cni´do•blast, n. [ Cnida + -blast.] (Zoöl.) One of the cells which, in the Cœlenterata, develop into cnidae.

Cnidocil
Cni´do•cil, n. [ Cnida + cilium eyelash.] (Zoöl.) The fine filiform process of a cnidoblast.