Castor Definition
- alpha geminorum
- caster
- beaver
- genus Castor
(astronomy) A double star in the constellation Gemini; alpha (α) Geminorum.
(Greek mythology) One of the Dioscuri.
Other Word Forms of Castor
Noun
Origin of Castor
-  Named from Greek mythology; see Castor and Pollux. The name pollux was given to another mineral with which it was always found. From Wiktionary 
-  From Old French castor (“beaver”), from Latin castor (“beaver”). From Wiktionary 
- Middle English from Latin beaver from Greek kastōr - From American Heritage Dictionary of the English Language, 5th Edition 
- Latin from Greek Kastōr twin of Pollux - From American Heritage Dictionary of the English Language, 5th Edition 
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