Any of various cud-chewing hoofed mammals having a stomach divided into four (occasionally three) compartments WordNet 3.0 & Open English WordNet

Ruminants are herbivorous grazing or browsing artiodactyls belonging to the suborder Ruminantia that are able to acquire nutrients from plant-based food by fermenting it in a specialized stomach prior to digestion, principally through microbial actions. Wikipedia

Ruminantia is a taxon within the order Artiodactyla that includes many of the well-known large grazing or browsing mammals such as cattle, goats, sheep, deer, and antelope. Wikipedia

suborder of ruminants Wikidata

Mammal that gets nutrients from plants by fermenting it with microbes in a specialized stomach before digestion Wikidata