rumen
/ˈruːmen/noun
(pl. rumens 或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【动】瘤胃（反刍动物的第一胃）。
词源
early 18th cent.: from Latin, literally 'throat'.