The Collaborative International Dictionary of English v.0.48:

Zygophyllaceae \Zy`go*phyl*la"ce*ae\, prop. n.
   A natural family of small trees, shrubs, and herbs of warm
   arid and saline regions; it is often resinous, and some are
   poisonous. It contains the genera Zygophyllum; Tribulus;
   Guaiacum; and Larrea.

   Syn: family Zygophyllaceae, bean-caper family.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Zygophyllaceae
    n 1: small trees, shrubs, and herbs of warm arid and saline
         regions; often resinous; some poisonous: genera
         Zygophyllum, Tribulus, Guaiacum, Larrea [syn:
         Zygophyllaceae, family Zygophyllaceae, bean-caper
         family]