Cretaceous

== English == === Etymology === Specific use of cretaceous. === Pronunciation === IPA(key): /kɹəˈteɪ.ʃəs/ Rhymes: -eɪʃəs === Proper noun === Cretaceous (geology) The geologic period within the Mesozoic era that comprises lower and upper epochs from about 146 to 66 million years ago. ==== Derived terms ==== ==== Translations ==== === See also === Appendix:Geologic timescale