- the small brown nut of the oak tree, that grows in a base that is like a cup Topics Plants and treesc2Word OriginOld English æcern, of Germanic origin; related to Dutch aker, also to acre, later associated with oak and the plant corn.
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Idioms
See acorn in the Oxford Advanced American Dictionarygreat/tall oaks from little acorns grow
- (saying) something large and successful often begins in a very small wayTopics Successc2
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acorn