fin whale
noun
1- a large rorqual with a small dorsal fin, a dark grey back, and white underparts长须鲸, 鳁鲸。亦称FINBACK, common rorqual.
1.1
- Balaenoptera physalus, family Balaenopteridae.拉丁名Balaenoptera physalus,鳁鲸科。