The Collaborative International Dictionary of English v.0.48:
Balaenopteridae \Balaenopteridae\ n. 1. rorquals; blue whales. Syn: family Balaenopteridae. [WordNet 1.5]WordNet (r) 3.0 (2006):
Balaenopteridae n 1: rorquals; blue whales [syn: Balaenopteridae, family Balaenopteridae]