Coch´le-a (L. coch´lea, a snail-shell). The spiral cavity of the internal ear.

Conch´a (Gr. κόγχη, konche, a mussel-shell). The external shell-shaped portion of the external ear.

Con-junc-ti´va (L. con and jun´go, to join together). A thin layer of mucous membrane which lines the eyelids and covers the front of the eyeball; thus joining the latter to the lids.

Con-trac-til´i-ty (L. con and tra´ho, to draw together). The property of a muscle which enables it to contract, or draw its extremities closer together.

Con-vo-lu´tions (L. con and vol´vo, to roll together). The tortuous foldings of the external surface of the brain.

Con-vul´sion (L. convel´lo, to pull together). A more or less violent agitation of the limbs or body.

Cor´ne-a (L. cor´nu, a horn). The transparent, horn-like substance which covers the anterior fifth of the eyeball.

Cor´pus-cles, Blood (L. dim. of cor´pus, a body). The small biconcave disks which give to the blood its red color; the white corpuscles are globular and larger.

Cos-met´ic (Gr. κοσμέω, kosmeo, to adorn). Beautifying; applied to articles which are supposed to increase the beauty of the skin, etc.