- of Devon, England
- designating or of the fourth geologic period of the Paleozoic Era, characterized by the development of the first ferns, mosses, gymnosperms, sharks, bony fishes, amphibians, and wingless insects: so called because rocks of the Devonian Period were first studied in Devon, England
the Devonian Period or its rocks
Of, relating to, or being the period of geologic time from about 416 to 359 million years ago, the fourth period of the Paleozoic Era. The Devonian Period is characterized by the development of lobe-finned fishes, the appearance of amphibians and insects, and the first forests. See Table at geologic time.
The Devonian Period.
Origin of DevonianAfter Devon, a county of southwest England.
- (chiefly dated) A native or inhabitant of the English region of Devon.
- (geology) the Devonian period