Ruminant

(ru' -min-ant) a chew the cud. In biology, chewing the cud; specifically applied to one of the best defined and most closely united of any of the groups of Alamma/ia (the Pecora or Cotylophora), the complicated stomach of which is characteristic, consisting of four well-defined compartments known as the rumen, or paunch; the reticulum, or honey-comb bag; the psa/terium, or man; the abomasum, or reed.