the edible, berrylike collective fruit of any tree of the genus Morus.
a tree of this genus, as M. rubra(red mulberry or American mulberry) bearing dark-purple fruit, M. nigra(black mulberry) bearing dark-colored fruit, or M. alba(white mulberry) bearing nearly white fruit and having leaves used as food for silkworms.
late 14c., developed from 13c. morberie, or cognate Middle High German mul-beri (alteration by dissimilation of Old High German mur-beri, Modern German Maulbeere); both from Latin morum "mulberry, blackberry," + Old English berie, Old High German beri "berry." The Latin word probably is from Greek moron "mulberry," from PIE *moro- "blackberry, mulberry" (cf. Armenian mor "blackberry," Middle Irish merenn, Welsh merwydden "mulberry"). Children's singing game with a chorus beginning "Here we go round the mulberry bush" is attested from 1820s, first in Scotland.