noun (plural rumens or rumina /-mɪnə/)Zoology
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.