Main definitions of castor in English

: castor1castor2Castor3

castor1

  • British spelling of caster (sense 3)

Pronunciation

castor

/ˈkastər//ˈkæstər/

Main definitions of castor in English

: castor1castor2Castor3

castor2

noun

  • An oily reddish-brown 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

/ˈkæstər//ˈkastər/

Main definitions of castor in English

: castor1castor2Castor3

Castor3

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

/ˈkæstər//ˈkastər/