(n)one of the four countries that make up the United Kingdom of Great Britain and Northern Ireland; during Roman times the region was known as Cambria, Syn.Cymru, Cambria
a. 1. (Geog.) Of or pertaining to Cambria or Wales. [ 1913 Webster ]
2. (Geol.) 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. [ 1913 Webster ]