Devonian
Concise Oxford English Dictionary © 2008 Oxford University Press:
Devonian /dɛˈvəʊnɪən, dɪ-/
▶adjective
- 1 relating to the English county of Devon.
- 2 Geology relating to or denoting the fourth period of the Palaeozoic era (between the Silurian and Carboniferous periods, about 409 to 363 million years ago), a time when the first amphibians appeared.
'Devonian' also found in these Oxford entries:

