noun
dinosaurs
Refers to the extinct reptiles; used in both scientific and popular contexts. The more common Japanese word is 恐竜 (きょうりゅう).
博物館でディノサウルスの化石を見た。
I saw a dinosaur fossil at the museum.
Borrowed from English 'dinosaurs', ultimately from Ancient Greek δεινός (deinós, 'terrible') + σαῦρος (saûros, 'lizard').