1. devonian - Noun
2. devonian - Adjective
3. Devonian - Proper noun
Of or pertaining to Devon or Devonshire in England; as, the Devonian rocks, period, or system.
The Devonian age or formation.
Source: Webster's dictionaryA band of Middle Devonian limestone runs west to east from Cremyll to Plymstock including the Hoe. Source: Internet
Also the first possible fossils of insects appeared around 416 Mya in the Early Devonian. Source: Internet
Before the discovery of a live specimen, the coelacanth time range was thought to have spanned from the Middle Devonian to the Upper Cretaceous period. Source: Internet
By approximately 350 million years ago (the end of the Devonian period ), photosynthesis had brought the concentration of atmospheric oxygen above 17%, which allowed combustion to occur. Source: Internet
Armored placoderms were numerous during the lower stages of the Devonian Period and became extinct in the Late Devonian, perhaps because of competition for food against the other fish species. Source: Internet
A second strong pulse closed the Devonian period. Source: Internet