1. enantiornithine - Noun
2. enantiornithine - Adjective
enantiornithine (plural enantiornithines)
(paleontology) Any of an extinct group of protobirds of the Enantiornithes.
enantiornithine (comparative more enantiornithine, superlative most enantiornithine)
Pertaining to the Enantiornithes.