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n. pl. ru·mi·na (-mə-nə) or ru·mens
The first division of the stomach of a ruminant animal, in which most food collects immediately after being swallowed and from which it is later returned to the mouth as cud for thorough chewing. Also called paunch.
[Latin rūmen; akin to Sanskrit romantha-, ruminant, chewing the cud.]
n, pl -mens or -mina (-mɪnə)
(Zoology) the first compartment of the stomach of ruminants, behind the reticulum, in which food is partly digested before being regurgitated as cud
[C18: from Latin: throat, gullet]
n., pl. -mi•na (-mə nə)
1. the first stomach of a ruminant, in which food is softened and then regurgitated for cud-chewing.
2. the cud of a ruminant.
[1720–30; < Latin rūmen]
The first and largest division of the stomach in ruminant animals, in which the food is fermented by microorganisms. See more at ruminant.
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|Noun||1.||rumen - the first compartment of the stomach of a ruminant; here food is collected and returned to the mouth as cud for chewing|
ruminant - any of various cud-chewing hoofed mammals having a stomach divided into four (occasionally three) compartments