rumen

noun
ru·​men | \ ˈrü-mən How to pronounce rumen (audio) \
plural rumina\ ˈrü-​mə-​nə How to pronounce rumen (audio) \ or rumens

Definition of rumen

: the large first compartment of the stomach of a ruminant in which cellulose is broken down by the action of symbiotic microorganisms — compare abomasum, omasum, reticulum

Other Words from rumen

ruminal \ ˈrü-​mə-​nᵊl How to pronounce rumen (audio) \ adjective

Examples of rumen in a Sentence

Recent Examples on the Web The study, published in the scientific journal Frontiers on Friday, looked at samples of rumen from Alpine cows in an abattoir in Austria. Sara Spary, CNN, 2 July 2021 Anuli had been undergoing treatment since October for episodes of abdominal distension in her rumen, the first compartment in her stomach, according to the zoo. Gabrielle Chung, PEOPLE.com, 5 Mar. 2021 Anuli had been under treatment since October for episodes of abdominal distension, specifically of her rumen, the first stomach of a ruminant which is where microbial fermentation takes place. Mckenna Oxenden, baltimoresun.com, 5 Mar. 2021 In particular, the team looked for molecules specific to animals with a rumen, or first stomach, that breaks down dense vegetation into cud. Theresa Machemer, Smithsonian Magazine, 7 Feb. 2020 The pollution problem is that fermentation of cellulose in rumens emits prodigious quantities of methane gas. Edward Lotterman, Twin Cities, 17 Nov. 2019 That methane is produced in their rumens from fermentation of grasses or corn. Julia Rosen, latimes.com, 18 June 2019 Cows and other ruminants such as goats and sheep have a special stomach called a rumen that houses millions of microbes. Elizabeth Pennisi, Science | AAAS, 3 July 2019 The rumen is the first of four compartments found in a ruminant’s stomach, where grass is partially digested via fermentation before passing through the rest. National Geographic, 3 July 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'rumen.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of rumen

1707, in the meaning defined above

History and Etymology for rumen

New Latin rumin-, rumen, from Latin

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Dictionary Entries Near rumen

Rumelian

rumen

rumenitis

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Cite this Entry

“Rumen.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rumen. Accessed 29 Nov. 2021.

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More Definitions for rumen

rumen

noun
ru·​men | \ ˈrü-mən How to pronounce rumen (audio) \
plural rumina\ -​mə-​nə How to pronounce rumen (audio) \ or rumens

Medical Definition of rumen

: the large first compartment of the stomach of a ruminant from which food is regurgitated for rumination and in which cellulose is broken down by the action of symbiotic microorganisms

called also paunch

— compare abomasum, omasum, reticulum

More from Merriam-Webster on rumen

Britannica.com: Encyclopedia article about rumen

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