|(Geol.)||A subdivision of the American Lower Silurian system embracing the calciferous, Quebec, and Chazy epochs. This period immediately follows the primordial or Cambrian period, and is by many geologists regarded as the beginning of the Silurian age, See the Diagram, under Geology.|
See also: Canadian
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.