What does artiodactyl mean?
An artiodactyl is any member of Artiodactyla, the large order of mammals known as even-toed ungulates. Its defining feature is in the feet: body weight rests mainly on an even number of toes — usually the third and fourth digits, often encased in a cloven hoof — rather than on a single central toe as in horses and rhinos. Familiar artiodactyls include cattle, sheep, pigs, goats, deer, camels, giraffes, hippopotamuses, and antelopes. Remarkably, modern classification places whales and dolphins within this same order, making them descendants of even-toed land mammals. The word functions both as a noun ('the fossil record of early artiodactyls') and as an adjective describing features of these animals. It belongs to formal, scientific registers and rarely appears in everyday conversation, but it is indispensable for anyone reading about mammalian evolution, anatomy, or taxonomy.
Any placental mammal of the order Artiodactyla, characterized by having an even number of functional toes on each foot.
"Early artiodactyls first appear in the fossil record shortly after the extinction of the dinosaurs."
Plural: artiodactyls.
Of or relating to the order Artiodactyla; having an even number of toes.
"The skeleton shows clearly artiodactyl features in its limb bones."
Regular plural; used when referring to multiple members of the order.
"Grasslands support vast herds of grazing artiodactyls."
Cows, whales, and hippos are closer cousins than you'd think — they're all artiodactyls, and hippos turned out to be the whale's closest living relatives.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of artiodactyl
The word derives from New Latin 'Artiodactyla', formed from Greek roots: 'artios', meaning even or complete, and 'daktylos', meaning finger or toe — hence 'even-toed'. The term was coined for zoological classification in the nineteenth century as naturalists formalized mammal taxonomy. The Greek root 'daktylos' also appears in related English borrowings such as 'pterodactyl' and 'dactylic'.
How artiodactyl is actually used
Chiefly used in zoology and paleontology; in general prose, terms like 'even-toed ungulate' or the specific animal name are more common. The adjective sense ('an artiodactyl limb structure') appears mostly in technical writing.
Easily confused with artiodactyl
A perissodactyl is an odd-toed ungulate (horses, rhinos, tapirs) bearing weight on an odd number of toes, whereas an artiodactyl bears weight on an even number of toes.