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flatus

American  
[fley-tuhs] / ˈfleɪ təs /

noun

flatuses plural
  1. intestinal gas produced by bacterial action on waste matter in the intestines and composed primarily of hydrogen sulfide and varying amounts of methane.


flatus British  
/ ˈfleɪtəs /

noun

  1. gas generated in the alimentary canal

"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

Etymology

Origin of flatus

1660–70; < New Latin; Latin: a blowing, breathing, breath, equivalent to flā ( re ) to blow + -tus suffix of v. action

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The goal is to determine the normal range of flatus production among people in the United States over the age of 18.

From Science Daily • Mar. 14, 2026

The extreme concentration of hydrogen in a flatus does make it easier to detect with a tiny sensor.

From The Wall Street Journal • Feb. 20, 2026

M Gove has promised to phase out diesel- and petrol-driven cars by 2040, a tiny flatus puff in a vast tornado, 22 years of slow death away.

From The Guardian • Jun. 3, 2018

Each day, up to 1500 mL of flatus is produced in the colon.

From Textbooks • Jun. 19, 2013

The alchemists used such terms as spiritus, flatus, halitus, aura, emanatio nubila, &c., words implying a “wind” or “breath.”

From Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 4 "G" to "Gaskell, Elizabeth" by Various

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