The Collaborative International Dictionary of English v.0.48:
Box \Box\ (b[o^]ks), n. [As. box, L. buxus, fr. Gr. ?. See Box
a case.] (Bot.)
A tree or shrub, flourishing in different parts of the world.
The common box (Buxus sempervirens) has two varieties, one
of which, the dwarf box (Buxus suffruticosa), is much used
for borders in gardens. The wood of the tree varieties, being
very hard and smooth, is extensively used in the arts, as by
turners, engravers, mathematical instrument makers, etc.
Box elder, the ash-leaved maple (Negundo aceroides), of
Box holly, the butcher's broom (Russus aculeatus).
Box thorn, a shrub (Lycium barbarum).
Box tree, the tree variety of the common box.