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Entry 7 senses · 4 variants Webster, 1913

Castor

/kăs'-tẽr/ · Cas·tor · IPA /ˈkæs.tɚ/
01 n. A genus of rodents, including the beaver. See Beaver.
  1. 1.
    A genus of rodents, including the beaver. See Beaver.(Zool.) See: Beaver
  2. 2.
    Castoreum. See Castoreum. See: Castoreum
  3. 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. 4.
    A heavy quality of broadcloth for overcoats.
02 n. See Caster, a small wheel.
  1. 1.
    See Caster, a small wheel. See: Caster
03 n. the northernmost of the two bright stars in the constellation Gemini, the other being Pollux.
  1. 1.
    the northernmost of the two bright stars in the constellation Gemini, the other being Pollux.(Astron.)
04 n. A variety of the mineral called petalite, from Elba.
  1. 1.
    A variety of the mineral called petalite, from Elba.(Min.)