A European shad (fish) with a deep blue back, silvery sides, and some spotting.→ shad
- ‘Unlike salmon, allis and twaite shad - which breed in just a few rivers in the United Kingdom - are unable to jump weirs, dams, and other man-made obstacles to migration.’
- ‘These twaite shad can be caught on fly or spinner and they fight majestically.’
- ‘In Europe, the principal species are Alosa alosa, the allis shad, and A. fallax, the twaite shad.’
- ‘The joint investigation by the EA and English Nature, both government agencies, found that twaite shad now breed in just four rivers, while the allis shad is confined to one - the Tamar, in southwest England.’
Early 17th century (as twaite): of unknown origin.