Found 2 items, similar to Cretaceous.
English → English (WordNet) Definition: cretaceous cretaceous adj 1: abounding in chalk 2: of or relating to the Cretaceous geologic era; “cretaceous rocks” n : from 135 million to 63 million years ago; end of the age of reptiles; appearance of modern insects and flowering plants [syn: Cretaceous period]
English → English (gcide) Definition: Cretaceous Cretaceous \Cre*ta"ceous\ (kr[-e]*t[=a]"sh[u^]s), a. [L. cretaceus, fr. creta chalk. See Crayon.] 1. Having the qualities of chalk; abounding with chalk; chalky; as, cretaceous rocks and formations. See Chalk. [1913 Webster] 2. (Geol.) Of, pertaining to, or designating, the period of time following the Jurassic and preceding the Tertiary, generally given as from 144 million years b. p. to 65 million years b. p.. Also called