Cambrian /(?)/

Cam·bri·an

Cambrian

a.
  1. Of or pertaining to Cambria or Wales. (Geog.)
  2. Of or pertaining to the lowest subdivision of the rocks of the Silurian or Molluscan age; -- sometimes described as inferior to the Silurian. It is named from its development in Cambria or Wales. See the Diagram under Geology. (Geol.)

Cambrian

n.
  1. A native of Cambria or Wales.
  2. The Cambrian formation. (Geol.)