Definition of Castor in English:

Castor

proper noun

  • 1Greek Mythology
    The twin brother of Pollux.

  • 2Astronomy
    The second brightest star in the constellation Gemini, close to Pollux. It is a multiple star system, the three components visible in a moderate telescope being close binaries.

Pronunciation:

Castor

/ˈkastər/

Definition of castor in English:

castor

noun

  • A reddish-brown oily substance secreted by beavers, used in medicine and perfumes.

    • ‘Beavers produce scent from their castor glands that creates a reddish stain on mounds of grass and mud that they build at the water's edge.’

Origin

Late Middle English (in the sense beaver): from Old French or Latin, from Greek kastōr.

Pronunciation:

castor

/ˈkastər/