Acorn

ā′korn, n. the seed or fruit of the oak.— adj. A′corned. — n. A′corn-shell , a name for the Balănus (L., acorn), a genus of Cirripedes in the cla Crustacea. [A.S. æcern , prob. from æcer , field, hence meaning 'the fruit of the unenclosed land.' The modern form is due to confusion with oak (A.S. ác ) and corn .]