finback

Definitions of finback
1

n large flat-headed whalebone whale having deep furrows along the throat; of Atlantic and Pacific

Synonyms:
Balaenoptera physalus, common rorqual, fin whale, finback whale
Type of:
razorback, rorqual
any of several baleen whales of the family Balaenopteridae having longitudinal grooves on the throat and a small pointed dorsal fin