Definition of rumen in English:


Line breaks: rumen
Pronunciation: /ˈruːmɛn

noun (plural rumens or rumina /-mɪnə/)

The first stomach of a ruminant, which receives food or cud from the oesophagus, partly digests it with the aid of bacteria, and passes it to the reticulum.
More example sentences
  • When calves are fed milk it is funnelled through the oesophageal groove to the true stomach, bypassing the rumen.
  • So mammals are unable to digest cellulose, except some ruminants that have cellulase-secreting bacteria in their rumens.
  • He was interested in improving digestive processes within the rumen, the first of the four stomachs of ruminant animals, where cellulose is broken down by bacteria.


early 18th century: from Latin, literally 'throat'.



More example sentences
  • Few studies have been conducted to examine the effects of live yeast products on in vitro mixed ruminal microorganism fermentation.
  • The effects of both S. cerevisiae supplements on the fermentation of soluble starch by mixed ruminal microorganisms are shown in Table 4.
  • Low quality forage also can negatively affect reproduction by decreasing efficiency of ruminal N utilization caused by limited energy supply.

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