sei whale
/seɪ/noun
1- a small rorqual with dark steely-grey skin and white grooves on the belly鳁鲸。
1.1
- Balaenoptera borealis, family Balaenopteridae.拉丁名Balaenoptera borealis,鳁鲸科。
词源
early 20th cent.: from Norwegian sejhval.