Source : Webster's Revised Unabridged Dictionary (1913)

Opuntia \O*pun"ti*a\, n. [NL.] (Bot.)
   A genus of cactaceous plants; the prickly pear, or Indian
   fig.

Source : WordNet®

Opuntia
     n : large genus of cactuses native to America: prickly pears
         [syn: {genus Opuntia}]