Noun | 1. | ![]() prickly pear - round or pear-shaped spiny fruit of any of various prickly pear cacti cactus - any succulent plant of the family Cactaceae native chiefly to arid regions of the New World and usually having spines genus Opuntia, Opuntia - large genus of cactuses native to America: prickly pears nopal, Opuntia lindheimeri - cactus having yellow flowers and purple fruits Opuntia tuna, tuna - tropical American prickly pear of Jamaica |