资料来源 : pyDict

白垩统; 白垩系

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Cretaceous \Cre*ta"ceous\, a. Also Cretacic \Cre*tac"ic\ (Geol.)
   Of, pertaining to, or designating, the period of time
   following the Jurassic and preceding the Eocene.