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lancetfish

[lan-sit-fish, lahn-]
noun, plural (especially collectively) lan·cet·fish, (especially referring to two or more kinds or species) lan·cet·fish·es.
  1. any large, marine fish of the genus Alepisaurus, having daggerlike teeth.
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Origin of lancetfish

First recorded in 1830–40; lancet + fish
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for lancet fish

lancet fish

noun
  1. either of two deep-sea teleost fishes, Alepisaurus ferox or A. borealis, having a long body with a long sail-like dorsal fin: family Alepisauridae
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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