The Collaborative International Dictionary of English v.0.48:
Nepenthaceae \Nepenthaceae\ prop. n. A natural family coextensive with the genus Nepenthes. Syn: family Nepenthaceae. [WordNet 1.5]WordNet (r) 3.0 (2006):
Nepenthaceae n 1: coextensive with the genus Nepenthes [syn: Nepenthaceae, family Nepenthaceae]