OAK

noun (plural ~s or ~) Usage: often attributive Etymology: Middle English ook, from Old English āc; akin to Old High German eih ~ and perhaps to Greek aigilōps, a kind of ~ Date: before 12th century 1. any of a genus ( Quercus ) of trees or shrubs of the beech family that produce acorns, the tough hard durable wood of an ~ tree, the leaves of an ~ used as decoration, ~en adjective