Meaning of castor
- a brownish, unctuous substance with a strong, penetrating odor, secreted by certain glands in the groin of the beaver, used in medicine and perfumery.
- a hat made of beaver or rabbit fur.
- a heavy woolen cloth used mainly for coats.
- a beaver.
- caster (defs. 2–5).
— n. Astron.
- a star of the second magnitude in the constellation Gemini, the more northerly of the two bright stars in this constellation.
- castor (Thesaurus)