[too-buh-feks, tyoo-]

noun, plural tu·bi·fex·es, (especially collectively) tu·bi·fex.

any common, bottom-dwelling worm of the genus Tubifex, often used as food for aquarium fish.

Origin of tubifex

< New Latin (1816); see tubi-, -fex
Also called red worm.
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British Dictionary definitions for tubifex


noun plural -fex or -fexes

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

Word Origin for tubifex

C19: from New Latin, from Latin tubus tube + facere to make, do
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