See under weever(def 1).
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.
Origin of weever
1615–25; perhaps continuing Middle English *wever, Old English wifer arrow (cognate with Old Norse vifr sword); modern meaning by association with obsolete wiver viper; see wyvern
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
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
Word Origin for weever
C17: from Old Northern French wivre viper, ultimately from Latin vīpera viper
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012