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.

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
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