devonian period is a noun meaning "from 405 million to 345 million years ago; preponderance of fishes and appearance of amphibians and ammonites". It carries one recorded sense.
from 405 million to 345 million years ago; preponderance of fishes and appearance of amphibians and ammonites
Definitions, synonyms and semantic relations for devonian period come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.