Opuntiales

from WordNet (r) 3.0 (2006)

Opuntiales
    n 1: coextensive with the family Cactaceae: cactuses [syn:
         {Opuntiales}, {order Opuntiales}]

from The Collaborative International Dictionary of English v.0.48

Opuntiales \Opuntiales\ prop. n.
   An order of plants coextensive with the family {Cactaceae},
   comprising the cactuses.

   Syn: order {Opuntiales}.
        [WordNet 1.5]