Cretacic

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Cretacic \Cre*tac"ic\
     [Webster 1913 Suppl. +PJC]
  
     {Cretaceous acid},
     an old name for carbonic acid.
  


     {Cretaceous formation} (Geol.), the series of strata of
        various kinds, including beds of chalk, green sand, etc.,
        formed in the Cretaceous period; -- called also the {chalk
        formation}. See the Diagram under {Geology}.
  
     {Cretaceous period} (Geol.), the time in the latter part of
        the Mesozoic age during which the Cretaceous formation was
        deposited, and at the end of which the dinosaurs died out.
        See {Cretaceous}.
        [1913 Webster +PJC]