Main Entry: acorn

Pronunciation: \ˈā-ˌkȯrn, -kərn\

Function: noun

Etymology: Middle English akern, from Old English æcern; akin to Middle High German ackeran acorns collectively, Old Irish áirne sloe, Lithuanian uoga berry

Date: before 12th century

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

[acorn illustration]