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Definition of "castor" [cas•tor•cast•or]

  • An oily, brown, odorous substance obtained from glands in the groin of the beaver and used as a perfume fixative. (noun)
  • A hat made of beaver fur or an imitation. (noun)
  • A heavy wool fabric used especially for overcoats. (noun)
  • Variant of caster. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Use "castor" in a sentence
  • "So she stepped around briskly, and spread her snow-white table-cloth, and put on her cups and saucers, and plates, and the castor -- (yes, the _castor_ on the _tea_ table! for they didn't care a pin for fashion); and when she had cooked her supper, she looked at the clock."
  • ""Why, it's only what we call the castor-bean, only this is larger," I venture to say."
  • "Dry disposal or storage involves placing the spent nuclear fuel rods in so-called castor casks, specially-designed steel and concrete cylinders."