Meaning of castor

cas•tor

Pronunciation: (kas'tur, kä'stur), [key]
— n.
  1. a brownish, unctuous substance with a strong, penetrating odor, secreted by certain glands in the groin of the beaver, used in medicine and perfumery.
  2. a hat made of beaver or rabbit fur.
  3. a heavy woolen cloth used mainly for coats.
  4. a beaver.

cas•tor

Pronunciation: (kas'tur, kä'stur), [key]
— n.
  1. caster (defs. 2–5).

Cas•tor

Pronunciation: (kas'tur, kä'stur), [key]
— n. Astron.
  1. a star of the second magnitude in the constellation Gemini, the more northerly of the two bright stars in this constellation.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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