Devonian

[de'vəunjən]

(noun.) from 405 million to 345 million years ago; preponderance of fishes and appearance of amphibians and ammonites.

Inputed by Boris--From WordNet

(a.) Of or pertaining to Devon or Devonshire in England; as, the Devonian rocks, period, or system.

(n.) The Devonian age or formation.

Checked by Janice

adj. belonging to Devonshire: belonging to a system of geological strata which abound in Devonshire closely corresponding to Old Red Sandstone.

Editor: Terence