Definify.com

Webster 1913 Edition

Laurentian

Lau-ren′tian

,

Adj.

Pertaining to, or near, the St. Lawrence River;

as, the

Laurentian

hills

.

Laurentian period

(Geol.)

,

the lower of the two divisions of the Archæan age; – called also

the Laurentian

.