(mathematics) A branch of mathematics which deals with spaces and maps between them in abstraction, taking similar theorems from various disparate more concrete branches of mathematics and unifying them.

Alternative form of cater-corner

plural of cater-cousin

Distant relative, especially a very distant relative, of doubtful relation.

A polyphenolic antioxidant plant metabolite.

plural of catechine

Alternative spelling of subcategory

A skiing practice where the off-piste downhill skiers are transported to their starting point with a snowcat instead of a ski lift or a helicopter as in heli-skiing.

(ethics) A fundamental ethical principle intended as a guide for determining whether any contemplated action is morally right, based on the concept that an action is good or bad in and of itself regardless of what the actor's aims or preferences are.

plural of categorical imperative