WordNet (r) 3.0 (2006):

family Agavaceae
    n 1: chiefly tropical and xerophytic plants: includes
         Dracenaceae (Dracaenaceae); comprises plants that in some
         classifications are divided between the Amaryllidaceae and
         the Liliaceae [syn: Agavaceae, family Agavaceae, agave
         family, sisal family]