Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Of, relating to, or being in the vicinity of the St. Lawrence River.
  • adjective Geology Of or relating to the Precambrian gneissic granite of the Lake Superior area.

from The Century Dictionary.

  • Of or pertaining to Laurentius or Lorenzo dei Medici, or to the Laurentian Library in Florence, named from him.
  • Of or pertaining to the river St. Lawrence: applied in geology, in 1854, by Sir W. E. Logan, to a series of rocks occupying an extensive area in the region of the Upper Lakes, and previously called by him the metamorphic series, and by Foster and Whitney the azoic series.
  • noun In geology, the Laurentian series.

from the GNU version of the Collaborative International Dictionary of English.

  • adjective Pertaining to, or near, the St. Lawrence River.
  • adjective (Geol.) the lower of the two divisions of the Archæan age; -- called also the Laurentian.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective Relating to a Precambrian geological region in eastern Canada, or the period of its formation.
  • adjective Relating to the Laurentian Mountains.
  • adjective Pertaining to, or near, the St. Lawrence River.
  • noun An extinct Iroquoian language of Canada.
  • noun geology The Laurentian period.

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[From Latin Laurentius, Lawrence.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Latin Laurentius ("Laurence") + -ian, after the St. Lawrence River.

Examples

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