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The Collaborative International Dictionary of English v.0.48 (gcide)

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

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