[tuh-rid-uh-spurm, ter-i-doh-] /təˈrɪd əˌspɜrm, ˈtɛr ɪ doʊ-/
any extinct seed-producing fernlike plant of the group Pteridospermae Also called seed fern
noun, Craniometry. 1. the craniometric point at the side of the sphenoidal fontanelle. pterion pter·i·on (těr’ē-ŏn’, tēr’-) n. The junction of the greater wing of the sphenoid bone and the squamous temporal, the frontal, and the parietal bones.
1. a combining form meaning “wing,” “feather,” used in the formation of compound words: pterodactyl. combining form 1. wing, feather, or a part resembling a wing: pterodactyl ptero- or pter- pref. Wing; feather: pterion.
[ter-uh-kahr-puh s] /ˌtɛr əˈkɑr pəs/ adjective, Botany. 1. having winged fruit.
noun 1. any of a number of genera of flying reptiles of the extinct order Pterosauria, from the Jurassic and Cretaceous periods, having a highly reduced tail and teeth and a birdlike beak. noun 1. any extinct flying reptile of the genus Pterodactylus and related genera, having membranous wings supported on an elongated fourth digit […]
noun, plural pteromata [tuh-roh-muh-tuh, te-] /təˈroʊ mə tə, tɛ-/ (Show IPA) 1. pteron.