age of dinosaurs; dinosaur era
Refers to the Mesozoic era when dinosaurs lived; used in both scientific and popular contexts.
The age of dinosaurs lasted from about 230 million to 66 million years ago.
Many fossils from the dinosaur era are on display at this museum.
中生代 is the formal geological term for the Mesozoic era, while 恐竜時代 is a more popular, descriptive term focusing on dinosaurs.
Compound of 恐竜 (dinosaur) and 時代 (era, period).