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castor
castornounAlso a brownish, unctuous substance with a strong, penetrating odor, secreted by certain glands in the groin of the beaver, used in medicine and perfumery.
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Castor
Castornouna star of the second magnitude in the constellation Gemini, the more northerly of the two bright stars in this constellation.
castor
1 Americannoun
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Also a brownish, unctuous substance with a strong, penetrating odor, secreted by certain glands in the groin of the beaver, used in medicine and perfumery.
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a hat made of beaver or rabbit fur.
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a heavy woolen cloth used mainly for coats.
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a beaver.
noun
noun
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the second brightest star, Alpha Geminorum, in the constellation Gemini: a multiple star consisting of six components lying close to the star Pollux. Distance: 52 light years
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classical myth See Castor and Pollux
noun
noun
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the brownish aromatic secretion of the anal glands of a beaver, used in perfumery and medicine
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the fur of the beaver
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a hat made of beaver or similar fur
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a less common name for beaver 1
Etymology
Origin of castor1
1350–1400; Middle English < Latin < Greek kástōr beaver
Origin of Castor2
Named after Castor; see Castor and Pollux
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The invasive species they brought — like black mustard, tree tobacco and castor bean — slowly crept into the ecosystem.
From Los Angeles Times • Dec. 14, 2024
Around 90% of oil is valuable for industrial uses in crops like castor beans, Bates said.
From Science Daily • Apr. 30, 2024
Other formulas are based on plant oils, including castor bean, cedarwood, clove and peppermint.
From Seattle Times • May 20, 2023
This is, in some sense, castor oil to swallow.
From Washington Post • Feb. 28, 2023
“A fermented mixture of corn, castor oil, eucalyptus extract, menthol, iron, potassium, and calcium,” Hattie Mae answered.
From "Moon Over Manifest" by Clare Vanderpool
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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.