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numbfish

[nuhm-fish]
noun, plural (especially collectively) numb·fish, (especially referring to two or more kinds or species) numb·fish·es.
  1. an electric ray, so called from its power of numbing its prey by means of electric shocks.
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Origin of numbfish

First recorded in 1705–15; numb + fish
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for numbfish

numbfish

noun plural -fish or -fishes
  1. any of several electric rays, such as Narcine tasmaniensis (Australian numbfish)
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Word Origin

C18: so called because it numbs its victims
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