Mononychus olecranus

n : 75-million-year-old turkey-sized long-legged fossil found in

the Gobi Desert of Mongolia having birdlike fused wrist

bones and keeled breastbone and a long tail resembling a

dinosaur's; short 3-inch-long forelimbs end in a single

claw instead of wings; classification as bird or dinosaur

is in dispute [syn: {Mononychus olecranus}]