1. A beaver, an amphibious quadruped, with a flat ovate tail, short ears, a blunt nose, small fore feet, and large hind feet.
2. A reddish brown substance of a strong penetrating smell, taken from bags or cods in the groin of the beaver; a powerful antispasmodic.
3. In astronomy, a moiety of the constellation Gemini, called also Apollo.
Castor and Pollux, in meterology, a fiery meteor, which, at sea, appears sometimes adhering to a part of a ship, in the form of one, two and even three or four balls. When one is See N alone, it is called Helena, which portends that the severest part of the storm is yet to come. Two appearing at once are denominated Castor and Pollux, or Tyndaridoe, and portend a cessation of the storm.