Dictionary

castor

noun cas·tor \ˈkas-tər\

Definition of CASTOR

1
:  beaver 1a
2
:  castoreum
3
:  a beaver hat
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Origin of CASTOR

Middle English, from Latin, from Greek kastōr, from Kastōr Castor
First Known Use: 14th century

Castor

noun Cas·tor \ˈkas-tər\

Definition of CASTOR

1
:  one of the Dioscuri
2
:  the more northern of the two bright stars in Gemini

Origin of CASTOR

Latin, from Greek Kastōr
First Known Use: 15th century

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