There are 2 definitions of Castor in English:

Castor

Syllabification: Cas·tor
Pronunciation: /ˈkastər
 
/
  • 1 Greek Mythology The twin brother of Pollux. See Dioscuri.
  • 2 Astronomy 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.

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Word of the day astrogation
Pronunciation: ˌastrəˈgāSHən
noun
(in science fiction) navigation in outer space

There are 2 definitions of Castor in English:

castor2

Syllabification: cas·tor
Pronunciation: /ˈkastər
 
/

noun

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

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