Placental mammal having hooves with an even number of functional toes on each foot WordNet 3.0 & Open English WordNet

Artiodactyls are mammals belonging to the order Artiodactyla. Wikipedia

Order of mammals Wikidata

Ungulate mammal from the order Artiodactyla having an even number of toe on each leg. OmegaWiki

Any ungulate mammal with an even number of toes and belonging to the Artiodactyla, including pigs, sheep, deer, cattle, and most grazing animals. In contrast, horses have an odd number of toes and as such are not Artiodactyla, but Perissodactyla. Wiktionary

Any ungulate mammal with an even number of toes. Wiktionary (translation)