- either of two small, European, marine fishes of the genus Trachinus, T. draco(greater weever ) or T. vipera(lesser weever ), having highly poisonous dorsal spines.
- any fish of the same family, Trachinidae.
- any small marine percoid fish of the family Trachinidae, such as Trachinus vipera of European waters, having venomous spines around the gills and the dorsal fin
