acorn
acorn, nut of the oak. Acorns are usually seated in or surrounded by a woody cupule. They mature within one to two seasons, and their appearance varies depending on the species of oak. Acorns provide food for wildlife and are used to fatten swine and poultry.
The Editors of Encyclopaedia Britannica This article was most recently revised and updated by Adam Augustyn.
Citation Information
Article Title:
acorn
Website Name:
Encyclopaedia Britannica
Publisher:
Encyclopaedia Britannica, Inc.
Date Published:
11 October 2026
Access Date:
November 13, 2026