| opuntia | (n) large genus of cactuses native to America: prickly pears, Syn. genus Opuntia |
| opuntiales | (n) coextensive with the family Cactaceae: cactuses, Syn. order Opuntiales |
| Opuntia | ‖prop. n. [ NL. ] (Bot.) A genus of cactaceous plants; the prickly pear, or Indian fig. [ 1913 Webster ] |
| Opuntiales | prop. n. An order of plants coextensive with the family |