noun \ˈā-ˌkrn, -kərn\

: the nut of the oak tree

Full Definition of ACORN

:  the nut of the oak usually seated in or surrounded by a hard woody cupule of indurated bracts

Illustration of ACORN

Origin of ACORN

Middle English akern, from Old English æcern; akin to Middle High German ackeran acorns collectively, Old Irish áirne sloe, Lithuanian uoga berry
First Known Use: before 12th century


noun    (Concise Encyclopedia)

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.


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