The Collaborative International Dictionary of English v.0.48:
Alopiidae \Alopiidae\ n. 1. 1 a family of fish comprising the thresher sharks. Syn: family Alopiidae. [WordNet 1.5]WordNet (r) 3.0 (2006):
Alopiidae n 1: thresher sharks [syn: Alopiidae, family Alopiidae]