/kam"bree euhn/ , adj.
1. Geol. noting or pertaining to a period of the Paleozoic Era, occurring from 570 million to 500 million years ago, when algae and marine invertebrates were the predominant form of life. See table under geologic time .
2. of or pertaining to Cambria; Welsh.
n.
3. Geol. the Cambrian Period or System.
4. a native of Cambria; Welshman.
[ 1580-90; Cambri ( a ) Wales, Latinization of MWelsh Cymry Wales, lit. Welshmen (see CYMRY) + -AN ]