castor Meaning, Definition & Usage

  1. noun a multiple star with 6 components; second brightest in Gemini; close to Pollux
    Alpha Geminorum.
  2. noun a shaker with a perforated top for sprinkling powdered sugar
    caster.
  3. noun a pivoting roller attached to the bottom of furniture or trucks or portable machines to make them movable
    caster.
  4. noun a hat made with the fur of a beaver (or similar material)
    beaver.
  5. noun type genus of the Castoridae: beavers
    genus Castor.

WordNet

Cas"tor noun
Etymology
L. castor the beaver, Gr. of uncertain origin.
Definitions
  1. (Zoöl.) 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.
Cast"or noun
Definitions
  1. See Caster, a small wheel.
Cas"tor noun
Etymology
L.
Definitions
  1. (Astron.) the northernmost of the two bright stars in the constellation Gemini, the other being Pollux.
Cas"tor, Cas"tor*ite noun (Also<
  • Castor
  • Castorite
)
Etymology
The minerals castor and pollux were so named because found together on the island of Elba. See Castor and Pollux.
Definitions
  1. (Min.) A variety of the mineral called petalite, from Elba.

Webster 1913