[ru.men] n, pl ru.mi.na or rumens [NL rumin-, rumen, fr. L] (ca. 1728): the large first compartment of the stomach of a ruminant in which cellulose is broken down by the action of symbiotic microorganisms--compare abomasum, omasum, reticulum -- ru.mi.nal adj
RUMEN
Meaning of RUMEN in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012