Source : Webster's Revised Unabridged Dictionary (1913)

Brachiate \Brach"i*ate\, a. [L. brachiatus (bracch-) with boughs
   or branches like arms, from brackium (bracch-) arm.] (Bot.)
   Having branches in pairs, decussated, all nearly horizontal,
   and each pair at right angles with the next, as in the maple
   and lilac.

Source : WordNet®

brachiate
     adj 1: having widely spreading paired branches; "maples are
            brachiate"
     2: having arms or armlike appendages
     v : swing from one hold to the next; "the monkeys brachiate"