Cambrian

 
Pronunciation: /ˈkambrɪən/

adjective

  • 1(chiefly in names or geographical terms) Welsh: the Cambrian Railway
  • 2 Geology relating to or denoting the first period in the Palaeozoic era, between the end of the Precambrian aeon and the beginning of the Ordovician period.
  • (as noun the Cambrian) the Cambrian period or the system of rocks deposited during it.

Origin:

mid 17th century: from Latin Cambria 'Wales', variant of Cumbria, from Welsh Cymry 'Welshman' or Cymru 'Wales'