The Collaborative International Dictionary of English v.0.48:

Bignoniaceous \Big*no`ni*a"ceous\, a. (Bot.)
   Of pertaining to, or resembling, the family of plants of
   which the trumpet flower (also called trumpet creeper and
   trumpet vine) is an example.
   [1913 Webster]

WordNet (r) 3.0 (2006):

trumpet vine
    n 1: a North American woody vine having pinnate leaves and large
         red trumpet-shaped flowers [syn: trumpet creeper,
         trumpet vine, Campsis radicans]
    2: evergreen North American honeysuckle vine having coral-red or
       orange flowers [syn: trumpet honeysuckle, coral
       honeysuckle, trumpet flower, trumpet vine, Lonicera
       sempervirens]