ruminant

Rothschild's giraffe, in Kenya. Both male and female giraffes have two to four permanent skin-covered horns.

Any even-toed hoofed mammal with a rumen, the ‘first stomach’ of its complex digestive system. Plant food is stored and fermented before being brought back to the mouth for chewing (chewing the cud) and then is swallowed to the next stomach. Ruminants include cattle, antelopes, goats, deer, and giraffes, all with a four-chambered stomach. Camels are also ruminants, but they have a three-chambered stomach.