Definition of: zygophyllaceous

(zī'gō·fi·lā'shəs) adjective Bot.
Designating or pertaining to a family (Zygophyllaceae) of herbs and shrubs, the caltrop family, having jointed branches, two–foliolate or pinnate stipulate leaves, and axillary white, red, or yellow flowers: mainly tropical in distribution. [<NL <Gk. zygon a yoke + phyllon a leaf]