—adj.
1 Welsh.
2 Geol. of or relating to the first period in the Palaeozoic era, marked by the occurrence of many forms of invertebrate life (including trilobites and brachiopods).
Usage:
Cf. Appendix II.
—n. this period or system.
Etymology: L Cambria var. of Cumbria f. Welsh Cymry Welshman or Cymru Wales
Useful english dictionary. 2012.