单词 | rumen |
释义 | rumenn. The first and largest stomach of a ruminant, in which food (esp. cellulose) is partly digested by bacteria, and from which it may pass back to the mouth as cud for further chewing, or on into the reticulum. ΘΚΠ the world > animals > mammals > group Ungulata (hoofed) > group Ruminantia (sheep, goats, cows, etc.) > [noun] > ruminant > parts of > stomach > first cudeOE paunch?1440 rumen1707 1707 J. Drake Anthropol. Nova I. xiv. 178 This first stomach, which is call'd the Rumen, is the largest of them. 1728 E. Chambers Cycl. (at cited word) In the Rumen, or first Ventricle of Camels, are found divers Sacculi, which contain a considerable Quantity of Water. 1846 J. Baxter Libr. Pract. Agric. (ed. 4) II. 143 All seems to go into the rumen, and has for awhile no power on the cuticular coat of that stomach. 1874 T. Hardy Far from Madding Crowd I. xxi. 236 He punctured the skin and rumen with the lance. 1937 L. A. Maynard Animal Nutrition viii. 209 It is very possible that the rumen flora on a synthetic diet is different from that on a ration of natural feeds. 1942 Proc. National Acad. Sci. U.S.A. 28 285 Bacteria normally living in the rumina of herbivores, such as sheep and cattle, produce considerable quantities of vitamins. 1992 Farmers Weekly 14 Aug. 50/3 The cows are fed a small amount of their milking ration to get their rumens used to handling high density feeds. 2007 Atlantic Monthly May 14/3 The methane..is produced by fermentation in the rumen and is ‘burped’ through the mouth. This entry has been updated (OED Third Edition, March 2011; most recently modified version published online March 2022). < n.1707 |
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