Definition of proavian in US English:

proavian

adjective

  • Of or relating to a hypothetical animal forming an evolutionary link between fossil reptiles and fossil birds.

noun

  • A proavian animal. Compare earlier proavis, and protobird.

Origin

Early 20th century; earliest use found in William Pycraft (1868–1942). From pro- + avian, after proavis.

Pronunciation

proavian

/prəʊˈeɪvɪən/