| a. | 1. | (Geog.) Of or pertaining to Cambria or Wales. |
| 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. | |
| n. | 1. | A native of Cambria or Wales. |
| 2. | (Geol.) The Cambrian formation. |
| Noun | 1. | Cambrian - from 544 million to about 500 million years ago; marine invertebrates Synonyms: Cambrian period |
| 2. | Cambrian - a native or resident of Wales | |
| Adj. | 1. | Cambrian - of or relating to or characteristic of Wales or its people or their language; "the Welsh coast"; "Welsh syntax" Synonyms: Welsh |