The Collaborative International Dictionary of English v.0.48:
Ascaphidae \Ascaphidae\ n. 1. 1 a natural family containing only one species of frog: the tailed frog. Syn: family Ascaphidae. [WordNet 1.5]WordNet (r) 3.0 (2006):
Ascaphidae n 1: family of one species of frog: tailed frog [syn: Ascaphidae, family Ascaphidae]