Centaurs are made to have the upper body of a human and lower body half as a horse. They are Greek monsters that are mythical creatures often said to have been born of Ixion and Nephele. Another version, however, makes them children of a certain Centaurus, who mated with the Magnesian mares. Also, this Centaurus was either himself the son of Ixion and Nephele, but that is unknown. Like minotaurs and harpies, they are meant to be half/part human, part/half animal. This is different from werebeasts like werebeasts who can transform traditionally, only not in the Monster High franchise until Welcome to Monster High. They are mythological creatures that are occasionally known as hippocentaur.
In Greek, they are known as Κένταυρος, which also translates to: "Kéntauros" in transliteration. While in Latin, the creatures are known as centaurus. Centaurs were set by the Greek god Zeus to guard and defend Dionsyso, also known as Dionysus, who was the god of the grape harvest in Greece and also wine and winemaking. Centaurs have a long history of being portrayed as half-man and half-horse in many areas of concept. The centaurs are also popular in Roman mythology.
In Monster High, known centaurs are Avea Trotter, Archer, and Tina Hay, while Avea is a girl who eats apples and oats just like a real horse. She also eats corn, oats and alfalfa. Nothing much is known about Archer or Tina Hay, but Archer is a horse with a human half body who speaks in horse tongue, or horse language instead of English and has a crush on Nightmare, while Tina Hay is a Monster High celebrity. Avea Trotter is an opinionated girl who interrupts a lot, while nothing much is known about the other two.