Definition of: brachiate

(brā′kē·it, -āt, brak′ē-) adjective Bot.
Having branches in pairs, each pair forming a right line with each other, and standing at right angles to the stem, or widely diverging.
—v.i. (-āt) ·at·ed, ·at·ing Zool. To move by a swinging motion of the arms, as from branch to branch of trees: said especially of certain arboreal apes not fully adapted to the erect posture and bipedal locomotion. [<L brachiatus having arms <brachium arm]
—bra′chi·a′tion noun