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 (to͞o′bə-fĕks′, tyo͞o′-)
n. pl. tubifex or tu·bi·fex·es
Any of various small slender reddish freshwater worms of the genus Tubifex, often used as food for tropical aquarium fish.

[New Latin Tubifex, genus name : Latin tubus, tube + Latin -fex, maker; see dhē- in Indo-European roots.]
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 -fex or -fexes
(Animals) any small reddish freshwater oligochaete worm of the genus Tubifex; it characteristically lives in a tube in sand and is used as food for aquarium fish
[C19: from New Latin, from Latin tubus tube + facere to make, do]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈtu bəˌfɛks, ˈtyu-)

n., pl. -fex•es, (esp. collectively) -fex.
any small bottom-dwelling annelid worm of the genus Tubifex, often used as food for aquarium fish.
[< New Latin (1816); see tube, -i-, -fex]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
Salmonid Whirling disease - Tubifex tubifex (Muller) identified as the essential oligochete in the protozoan life-cycle.
Moreover, studies regarding live feed for fish have generally focused on certain species of worms (Tubifex tubifex, and the earthworm Eisenia foetida).
2010; Jamshidi-Zanjani and Saeedi 2013), there are no data on the species diversity of the Oligochaeta of the region, except the single record of Tubifex tubifex by Pourang (1996).
Biagianti-Risbourg, "Effects of chitosan on oxidative stress and metallothioneins in aquatic worm Tubifex tubifex (Oligochaeta, Tubificidae)," Chemosphere, vol.
Effects of Tubifex tubifex (Oligochaeta: Tubificidae) on N-mineralization in freshwater sediments, measured with 15N isotopes.
Observations on cohorts of Tubifex tubifex cultured at different food levels, using cellulose substrate.
Among Oligochaetes, the participation of Tubifex tubifex was shown to be maximum at all the stations with highest mean standing crop at St I (136.5 ind.[m.sup.-2] [+ or -] 369.36) followed by St II (84 ind.[m.sup.-2] [+ or -] 241.42), St III (67.5 ind.[m.sup.-2] [+ or -] 98.97) and St IV (60.75 ind.[m.sup.-2] [+ or -] 84.12).