Phrase guide

acorn nut

noun · 1 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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No pronunciation record was provided for this word.

1

noun

Meaning 1

A closed nut having a dome-like cap over the rear protruding part of the engaged screw or bolt.

Definition source: English Wiktionary via Wiktextract

Topics: engineering, natural-sciences, physical-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: cap nut, dome nut

Antonyms: none provided

Broader terms: nut, fastener, hardware

History

Etymology

From acorn + nut, because it resembles an acorn.