Cambrian
Cambrian , adjective
1.
(Geography) Of or pertaining to Cambria or Wales.
2.
(Geology) 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.
Cambrian , noun
1.
A native of Cambria or Wales.
2.
(Geology) The Cambrian formation.