The Collaborative International Dictionary of English v.0.48:

madagascar jasmine \madagascar jasmine\ n. (Bot.)
   A twining woody vine (Stephanotis floribunda) of Madagascar
   having thick dark waxy evergreen leaves and clusters of large
   fragrant waxy white flowers along the stems; widely
   cultivated in warm regions.

   Syn: waxflower, Stephanotis floribunda.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Madagascar jasmine
    n 1: twining woody vine of Madagascar having thick dark waxy
         evergreen leaves and clusters of large fragrant waxy white
         flowers along the stems; widely cultivated in warm regions
         [syn: Madagascar jasmine, waxflower, Stephanotis
         floribunda]