rumen
noun
ru·men ˈrü-mən 
plural rumina ˈrü-mə-nə or rumens
or rumens : 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
ruminal
ˈrü-mə-nᵊl
adjective 
Example Sentences
Recent Examples on the Web The smaXtec sensor also measures the movement inside of the rumen. 
Steven Savage, Forbes, 9 June 2022 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 See More
Steven Savage, Forbes, 9 June 2022 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 See More Word History
Etymology
New Latin rumin-, rumen, from Latin
First Known Use
1707, in the meaning defined above
Medical Definition
rumen
noun
ru·men ˈrü-mən
plural rumina -mə-nə or rumens
or rumens : 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