The Collaborative International Dictionary of English v.0.48:

Passifloraceae \Passifloraceae\ prop. n.
   A natural family of tropical woody tendril-climbing vines.

   Syn: family Passifloraceae, passionflower family.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Passifloraceae
    n 1: tropical woody tendril-climbing vines [syn:
         Passifloraceae, family Passifloraceae, passionflower
         family]