Castor

n. [Fr., Pr., Sp., & Pg. castor; It. castoro, from Lat. castor, Gr. κάστωρ, akin to Skr. kastūri, kastūrikā, musk.]

1Sense 1. (Zo-ol.) A genus of animals, in which the beaver is included. See BEAVER.

2Sense 2. A substance of a strong, penetrating smell and bitter taste, of a yellowish or light-brown color, obtained from two secretory sacs, one in each groin of the beaver; castoreum. It has been regarded as an antispasmodic. Junglison.

3Sense 3. A hat, especially one made of the fur of the beaver. [Colloq.]

I have always been known for the jaunty manner in which I wear my castor. W. Scott.

4Sense 4. A heavy quality of broadcloth used for overcoats.