• synonyms


  1. the head of a bolt.
  2. Chemistry. (formerly) a matrass.
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Origin of bolthead

late Middle English word dating back to 1425–75; see origin at bolt1, head
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for bolthead

Historical Examples of bolthead

  • If I'd 'a' called it a bolthead it would 'a' done just as well.

    The Adventures of Huckleberry Finn

    Mark Twain

  • Let a condensed beam be sent through a large flask or bolthead containing common air.