Definitions for opuntia
Opuntia, genus Opuntia(noun)
large genus of cactuses native to America: prickly pears
A genus of flower, of which the only current member is the prickly pear.
U.S. National Library of Medicine
A plant genus of the family CACTACEAE. Species with cylindrical joints are called Cholla; flat jointed ones are Prickly-pear.