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Any of numerous small colorful tropical freshwater fishes chiefly of the family Characidae, such as the neon tetra, often kept in home aquariums.

[Short for New Latin Tetragōnopterīnī, group name : Late Latin tetragōnum, tetragon; see tetragon + Greek pteron, wing.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


n, pl -ra or -ras
(Animals) any of various brightly coloured tropical freshwater fishes of the genus Hemigrammus and related genera: family Characidae (characins)
[C20: short for New Latin tetragonopterus (former genus name), from tetragon + -o- + -pterous, from Greek pteron wing]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈtɛ trə)

n., pl. -ras.
any of several small, brightly colored characin fishes, of tropical American waters.
[1930–35; shortening of New Latin Tetragonopterus former genus name. See tetragon, -o-, -pterous]


a combining form meaning “four”: tetralogy.
Also, esp. before a vowel,tetr-.
[< Greek, comb. form of téttares four]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.tetra - brightly colored tropical freshwater fishestetra - brightly colored tropical freshwater fishes
characid, characin, characin fish - any freshwater fish of the family Characinidae
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
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