Pronunciation: (du-vō'nē-un), [key]
1. Geol.noting or pertaining to a period of the Paleozoic Era, 405 to 345 million years ago, characterized by the dominance of fishes and the advent of amphibians and ammonites. See table under geologic time.
2. of or pertaining to Devonshire, England.
Geol.the Devonian Period or System.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.