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[fley-tuh s] /ˈfleɪ təs/
noun, plural flatuses.
intestinal gas produced by bacterial action on waste matter in the intestines and composed primarily of hydrogen sulfide and varying amounts of methane.
Also called gas.
Origin of flatus
1660-70; < New Latin; Latin: a blowing, breathing, breath, equivalent to flā(re) to blow + -tus suffix of v. action Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for flatus


noun (pl) -tuses
gas generated in the alimentary canal
Word Origin
C17: from Latin: a blowing, snorting, from flāre to breathe, blow
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
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Word Origin and History for flatus

1660s, from Latin flatus "a blowing," from flare "to blow" (see blow (v.1)).

Online Etymology Dictionary, © 2010 Douglas Harper
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flatus in Medicine

flatus fla·tus (flā'təs)
Gas generated in or expelled from the digestive tract, especially from the stomach or intestines.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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