Circumduc´tion, n. Movement of a limb by which, if completed, a cone is described.
Cirrh´ous, a. Tufted.
Class, n. Fundamental division of animals: the class of Birds; the class Aves.
Classifica´tion, n. Systematic arrangement.
Clav´icle, n. Collar-bone. In birds, the two clavicles usually unite to form the furculum, merry-thought or wish-bone.
Clavic´ular, a. Pertaining to the clavicles.
Claw, n. (121.)
Claw-joint, n. (122.) See Rhizonychium.
Clit´oris, n. Erectile venereal organ of the female, homologue of the male penis, present in some birds.
Cloa´ca, n. Enlarged lower end of straight gut, receptacle of products of genito-urinary system and refuse of digestion.