The Collaborative International Dictionary of English v.0.48:
Nymphaeaceae \Nymphaeaceae\ prop. n. A natural family of dicot aquatic plants. Syn: family Nymphaeaceae, water-lily family. [WordNet 1.5]WordNet (r) 3.0 (2006):
Nymphaeaceae n 1: dicot aquatic plants [syn: Nymphaeaceae, family Nymphaeaceae, water-lily family]