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castor

nounnounnounattested in dialogue

  • United Kingdom//ˈkɑːs.tə//
  • United States//ˈkæs.tɚ//

A hat made from the fur of the beaver.

noun

  1. 1

    A hat made from the fur of the beaver.

    I have been always noted for the jaunty manner in which I wear my castor—[…]

  2. 2

    A heavy quality of broadcloth for overcoats.

  3. 3

    Castoreum (bitter exudate of mature beavers).

  4. 4

    Any of various nymphalid butterflies of the genus Ariadne, of Africa and Asia.

Etymology

From Middle French castor, from Old French castor (“beaver”), from Latin castor (“beaver”), from Ancient Greek κάστωρ (kástōr), from Doric Greek κάστον (káston, “wood”).

noun

  1. 1

    A variety of petalite found in Elba.

Etymology

Named from Greek mythology; see Castor and Pollux. The name pollux was given to another mineral with which it was always found.

noun

  1. 1

    Alternative spelling of caster, especially in its senses A pivoting roller attached to the bottom of furniture to allow it to be moved.

  2. 2

    Alternative spelling of caster, especially in its senses A container with a perforated cap for sprinkling its contents, especially salt, pepper, etc.

    Mrs. Hussey soon appeared, with a mustard-pot in one hand and a vinegar-cruet in the other, having just broken away from the occupation of attending to the castors, and scolding her little black boy meantime.

Etymology

Alternative spelling of caster, via cast + -or (the Latinate varient of -er).

Forms

plural
castors
The neighbouring pagesAlphabetical order follows the rules of the language, not byte values: an accent decides only between two otherwise identical words, and Spanish files Ñ as a letter of its own.

Lexical content from Wiktionary, under CC BY-SA 4.0 · Source entry · Data version 2026-08-23

Rank among the words of the OpenSubtitles 2018 corpus — film and television subtitles, so spoken rather than written usage (CC BY-SA 3.0).