n. [ L. castor the beaver, Gr. &unr_;; of uncertain origin. ]
I have always been known for the jaunty manner in which I wear my castor. Sir W. Scott. [ 1913 Webster ]
n. [ L. ] (Astron.) the northernmost of the two bright stars in the constellation Gemini, the other being Pollux. [ 1913 Webster ]
n. See Caster, a small wheel. [ 1913 Webster ]
[ Castor and Pollux were twin sons of Jupiter and Leda. ] (Naut.) See
(Bot.) The bean or seed of the castor-oil plant (Ricinus communis, or Palma Christi.) [ 1913 Webster ]
n. [ L. See Castor. ] A peculiar bitter orange-brown substance, with strong, penetrating odor, found in two sacs between the anus and external genitals of the beaver; castor; -- used in medicine as an antispasmodic, and by perfumers. [ 1913 Webster ]
n. a natural family comprising the beavers.
n. [ From 1st Castor. ] (Chem.) A white crystalline substance obtained from castoreum. [ 1913 Webster ]
n. a genus of extinct beavers of the Pleistocene; of eastern and southern U.S.