Source : Webster's Revised Unabridged Dictionary (1913)

Strophanthus \Stro*phan"thus\, n. [NL., from Gr. ? a turning + ?
   a flower.] (Bot.)
   A genus of tropical apocynaceous shrubs having singularly
   twisted flowers. One species ({Strophanthus hispidus}) is
   used medicinally as a cardiac sedative and stimulant.

Source : WordNet®

strophanthus
     n : any of various shrubs or small trees of the genus
         Strophanthus having whorled leaves and showy flowers of
         various colors in dense and few-flowered corymbose
         clusters; some have poisonous seeds