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bolthead

American  
[bohlt-hed] / ˈboʊltˌhɛd /

noun

  1. the head of a bolt.

  2. Chemistry. (formerly) a matrass.


Etymology

Origin of bolthead

late Middle English word dating back to 1425–75; see origin at bolt 1, head

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.

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

From Fragments of science, V. 1-2 by Tyndall, John

My eye took in every trifle, every bolthead, rivet, scratch, dent, indicator, seam and panel, playing with them in my mind, making and rejecting patterns.

From Greener Than You Think by Moore, Ward

Not far away was a tremendous assembling and repair plant for airplanes, the operators of which had all been trained in the French factories, so that they knew the planes to the last inner bolthead.

From Our Army at the Front by Broun, Heywood

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

From The Adventures of Huckleberry Finn Tom Sawyer's Comrade by Twain, Mark