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Meaning of Laurentian

Lau•ren•tian

Pronunciation: (lô-ren'shun), [key]
— adj.
  1. of or pertaining to the St. Lawrence River.
  2. noting or pertaining to the granite intrusions and orogeny in Canada around the Great Lakes during Archeozoic time.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.