Conjunctiva. The membrane covering the eyeball and lining the lid.

Contagion. The transmitting of disease by contact.

Continuity. An uninterrupted connection.

Contra Indication. An indication against certain treatment.

Contusion. Bruise.

Convalescence. A period of regaining of health.

Convulsions. Involuntary contractions of muscular parts.

Copulation. Joining together; coition.

Comedones. Black spots on the face.

Coronal. Belonging to the crown or top of the head.