Vicious six-legged weasel-like creature with fur made of actual gold. Beware! It's a high-level monster and is a lot more vicious than it looks, although it's a great find for AD&D players more interested in treasure hoarding than adventuring.
"aurum" sounds like a Latin word root and is adapted from the Latin word for gold. "vorax" is probably just invented (though again it has a definite Latin sound).
Watch out! There's an aurumvorax hiding under your sofa!
I let the aurumvorax loose in the classroom, and everyone ran away (hee hee)