Английский разговорный словарь (основной) - acorn

ˈeɪkɔ:n n. the fruit of the oak, with a smooth nut in a rough cuplike base. øacorn barnacle a multivalve marine cirriped, Balanus balanoides, living on rocks. acorn worm any marine wormlike animal of the phylum Hemichordata, having a proboscis and gill slits, and inhabiting seashores. [OE ócern, rel. to ócer ACRE, later assoc. with OAK and CORN(1)]