no·pal /noˈpɑl, ˈpæl; ˈnopəl/
  No·pal n.  Bot. A cactaceous plant (Nopalea cochinellifera), originally Mexican, on which the cochineal insect feeds, and from which it is collected.  The name is sometimes given to other species of Cactaceae.
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  nopal
       n 1: cactus having yellow flowers and purple fruits [syn: Opuntia
            lindheimeri]
       2: any of several cacti of the genus Nopalea resembling prickly
          pears