acorn


Concise Oxford English Dictionary © 2008 Oxford University Press:
acorn/ˈeɪkɔːn/
▶noun the fruit of the oak, a smooth oval nut in a cup-like base.
– origin OE æcern, of Gmc origin; rel. to acre, later assoc. with oak and corn1.
'acorn' also found in these Oxford entries:
acorn barnacle - acorn worm - balanitis - bur oak - fruit - glans - hemichordate - myrobalan - pig - pterobranch - turkey oak - valonia

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