twaite shad
/tweɪt/noun
1- a European shad (fish) with a deep blue back, silvery sides, and some spotting混西鲱。
1.1
- Alosa fallax, family Clupeidae.拉丁名Alosa fallax,鲱科。
词源
early 17th cent. （as twaite）： of unknown origin.