1. The central mass of necrotic tissue in a boil.
2. A metal casting, usually with a post in the canal of a tooth Root, designed to retain an artificial crown.
3. A sectional record, usually of plaster of paris or one of its derivatives, of the relationships of parts, such as teeth, metallic restorations, or copings.
Origin: L. Cor, heart
4. The pupil (of the eye).
Origin: g. Kore, pupil