of, denoting, or formed in the first 65 million years of the Palaeozoic era, during which marine invertebrates, esp trilobites, flourished
2.
of or relating to Wales
noun
3. the Cambrian
4.
a Welsh person
Cambrian in American English
(ˈkæmbriən)
adjective
1.
of Cambria; Welsh
2.
designating or of the first geologic period of the Paleozoic Era, characterized by the development of warm, shallow seas and the first hard-shelled marine animals, esp. trilobites and brachiopods