oak . ( Of the lat. ) vulg. ( ilicina ). 1. f. family tree of the Fagáceas of ten to twelve metres high, with thick trunk, branching in various arms, which depart branches, forming a large, round Cup, elliptic leaves, somewhat pointed, sometimes spiny, hard, leathery, persistent, verdinegras on top and more or less whitish on the underside, yellowish-green flowers. Fruit is sweet or bitter, acorns according to varieties and very hard and compact wood. 2. f. wood of this tree.