Colorless or pale yellowish oil extracted from the seeds of the
castor-oil plant, used as a laxative and skin softener.

catarrh
Inflammation of mucous membranes, especially in the nose and throat.

catechu (cutch, Acacia catechu, betel palm)
Spiny Asian tree with yellow flowers, and dark heartwood. A raw material
obtained from the heartwood of this plant, used in the preparation of
tannins and brown dyes.

caudal
Near the tail or hind parts; posterior. Similar to a tail in form or
function.

caustic potash (potassium hydroxide)
Caustic white solid, KOH, used as a bleach and in the manufacture of
soaps, dyes, alkaline batteries.

cerate
Hard, unctuous, fat or wax-based solid, sometimes medicated, formerly
applied to the skin directly or on dressings.

chambray
Fine lightweight fabric woven with white threads across a colored warp.

chancel
Space around the altar of a church for the clergy and sometimes the
choir, often enclosed by a lattice or railing.