Laurentian

1 definition found

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

  Laurentian \Lau*ren"tian\, a.
     Pertaining to, or near, the St. Lawrence River; as, the
     Laurentian hills.
     [1913 Webster]
  
     {Laurentian period} (Geol.), the lower of the two divisions


        of the Arch[ae]an age; -- called also {the Laurentian}.
        [1913 Webster]