Definition of acorn nut
: a nut with a dome-shaped head that is used to cover the threaded end of a bolt … few things are more beautiful to car buffs than the sight of two long polished cam covers held down by acorn nuts. — Bill Vance, Toronto Star, 2 Jan. 1988
Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.
Join MWU now and get access to America’s largest dictionary, with:
- 300,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
First Known Use of acorn nut
Seen and Heard
What made you want to look up acorn nut? Please tell us where you read or heard it (including the quote, if possible).