bolthead

[ bohlt-hed ]

noun

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

Word History and Origins

Origin of bolthead¹

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

Example Sentences

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

From Project Gutenberg

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

From Project Gutenberg