tragelaphi

Noun

tragelaphus (plural tragelaphi)

1. A fictional animal, half goat, half stag, used by the philosopher Aristotle as an example of something that is knowable even though it does not exist.
   • The canathrum, as they call it, is a chair or chariot made of wood, in the shape of a griffin, or tragelaphus, on which the children and young virgins are carried in processions.1861, Plutarch, Plutarch's Lives: The Translation Called Dryden's, page 23