DEVONIAN

Devonian, Devonian period, Age of Fishes

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

Source: WordNet® 3.1

Etymology

Adjective

Devonian (not comparable)

(geology) of a geologic period within the Paleozoic era; comprises lower, middle and upper epochs from about 415 to 360 million years ago

(chiefly, dated) Of or pertaining to the English region of Devon.

Noun

Devonian (plural Devonians)

(chiefly, dated) A native or inhabitant of the English region of Devon.

Proper noun

Devonian

(geology) the Devonian period

Source: Wiktionary

De*vo"ni*an, a. (Geol.)

Definition: Of or pertaining to Devon or Devonshire in England; as, the Devonian rocks, period, or system. Devonian age (Geol.), the age next older than the Carboniferous and later than the Silurian; -- called also the Age of fishes. The various strata of this age compose the Devonian formation or system, and include the old red sandstone of Great Britain. They contain, besides plants and numerous invertebrates, the bony portions of many large and remarkable fishes of extinct groups. See the Diagram under Geology.

De*vo"ni*an, n.

Definition: The Devonian age or formation.

Source: Webster’s Unabridged Dictionary 1913 Edition