Cas"tor (?), n. [L. castor the beaver, Gr. ; of uncertain origin.]
1. Zool.
A genus of rodents, including the beaver. See Beaver.
2.
Castoreum. See Castoreum.
3.
A hat, esp. one made of beaver fur; a beaver.
I have always been known for the jaunty manner in which I wear my castor.
Sir W. Scott.
4.
A heavy quality of broadcloth for overcoats.
© Webster 1913.
Cast"or (?), n.
See Caster, a small wheel.
© Webster 1913.
Cas"tor (?), n. [L.] Astron.
the northernmost of the two bright stars in the constellation Gemini, the other being Pollux.
© Webster 1913.
Cas"tor, Cas"tor*ite (?), n. [The minerals castor and pollux were so named because found together on the island of Elba. See Castor and Pollux.] Min.
A variety of the mineral called petalite, from Elba.
© Webster 1913.