Cre·ta·ceous /krɪˈteʃəs/
  (a.)白堊的,白堊紀的白堊紀,白堊系
  Cre·ta·ceous a.
  1. Having the qualities of chalk; abounding with chalk; chalky; as, cretaceous rocks and formations. See Chalk.
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  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]