non-avian dinosaur UK /ˈnɒnˌeɪ̯viən ˈdaɪ̯nəsɔː/US /ˈnɑnˌeɪ̯viən ˈdaɪ̯nəsɔːɹ/ noun1 •Any of the species belonging to the clade Dinosauria that are not also members of the clade Aves. formsnon-avian dinosaurs
