Wordnet 3.0
NOUN (1)
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]
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]