Rare ·Advanced level

Definitions

Noun

1. 1
   most primitive avian type known; extinct bird of the Triassic having bird-like jaw and hollow limbs and breastbone with dinosaur-like tail and hind limbs wordnet

Synonyms

All synonyms

avian fossildisputed claimearly bird fossilpre archaeopteryx fossilprotoavian fossilunverified claim

Antonyms

All antonyms

confirmed avian fossilnonavian fossilpost Archaeopteryx fossilvalidated fossil