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1. (adj.) cretaceous
resembling or containing chalk.
2. cretaceous
(cap.) noting or pertaining to a period of the Mesozoic Era, from 140 million to 65 million years ago, characterized by the greatest development and subsequent extinction of dinosaurs and the advent of flowering plants and modern insects.
3. (n.) cretaceous
(cap.) the Cretaceous Period or System.
Etymology: (1665–70; < L crētāceus=crēt(a) chalk, clay (cf. crayon ) +-āceus -aceous ; the geological period was defined from the chalk beds of SE England)
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| Definition of 'cretaceous' |
Princeton's WordNet |
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1. (adj) Cretaceous, Cretaceous period
from 135 million to 63 million years ago; end of the age of reptiles; appearance of modern insects and flowering plants
2. (adj) cretaceous
abounding in chalk
3. (adj) Cretaceous
of or relating to or denoting the third period of the Mesozoic era
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| Definition of 'cretaceous' |
Webster Dictionary |
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1. (adj) cretaceous
having the qualities of chalk; abounding with chalk; chalky; as, cretaceous rocks and formations. See Chalk
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Definitions of cretaceous 
