WordNet (r) 3.0 (2006):

subclass Caryophyllidae
    n 1: a group of families of mostly flowers having basal or
         central placentation and trinucleate pollen (binucleate
         pollen is commoner in flowering plants); contains 14
         families including: Caryophyllaceae (carnations and pinks);
         Aizoaceae; Amaranthaceae; Batidaceae; Chenopodiaceae;
         Cactaceae (order Opuntiales); Nyctaginaceae;
         Phytolaccaceae; corresponds approximately to order
         Caryophyllales; sometimes classified as a superorder [syn:
         Caryophyllidae, subclass Caryophyllidae]