Castor /(?)/

Cas·tor

Castor

n.
  1. A genus of rodents, including the beaver. See Beaver. (Zool.)
  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.
  4. A heavy quality of broadcloth for overcoats.

Castor

n.
  1. See Caster, a small wheel.

Castor

n.
  1. the northernmost of the two bright stars in the constellation Gemini, the other being Pollux. (Astron.)

Castor

n.
  1. A variety of the mineral called petalite, from Elba. (Min.)