Ruminant

ruminant \ˈrü-mə-nənt\ adjective: 1. of or relating to even-toed hoofed mammals (as sheep, oxen, deer and camels) that chew the cud, 2. characterized by chewing again what has been swallowed, 3. given to or engaged in contemplation; meditative
noun: a ruminant mammal

Etymology: Latin ruminare to chew the cud

It’s amazing that ruminate can mean “to reflect” or “to chew the cud.” What an evocative image for contemplative individuals to be likened to masticating ungulates.