Cretaceous
Concise Oxford English Dictionary © 2008 Oxford University Press:
Cretaceous /krɪˈteɪʃəs/
▶adjective Geology relating to or denoting the last period of the Mesozoic era (between the Jurassic and Tertiary periods, about 146 to 65 million years ago), a time when the first flowering plants appeared and at the end of which dinosaurs, ammonites, and many other organisms died out.
'Cretaceous' also found in these Oxford entries:
ammonite
- ankylosaur
- belemnite
- brachiosaurus
- deinonychus
- elasmosaur
- gallimimus
- Gault clay
- giganotosaurus
- iguanodon
- Jurassic
- K/T boundary
- lower
- Mesozoic
- Palaeocene
- protoceratops
- pteranodon
- pterosaur
- rudist
- tertiary
- triceratops
- tyrannosaur
- velociraptor
- Wealden
