- rorqual, razorback - any of several baleen whales of the family Balaenopteridae having longitudinal grooves on the throat and a small pointed dorsal fin
--1 is a kind of baleen whale, whalebone whale
--1 is a member of Balaenopteridae, family Balaenopteridae
--1 has particulars:finback, finback whale, fin whale, common rorqual, Balaenoptera physalus; sei whale, Balaenoptera borealis; lesser rorqual, piked whale, minke whale, Balaenoptera acutorostrata