- 1. a. Of or pertaining to Devon or Devonshire in England; as, the Devonian rocks, period, or system. Source: opted
- 2. n. The Devonian age or formation. Source: opted
- 3. 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. The Devonian age or formation. Source: webster
- 4. Of or pertaining to Devon or Devonshire in England; as, theDevonian rocks, period, or system. Devonian age (Geol.), the age nextolder than the Carboniferous and later than the Silurian; -- calledalso the Age of fishes. The various strata of this age compose theDevonian formation or system, and include the old red sandstone ofGreat Britain. They contain, besides plants and numerousinvertebrates, the bony portions of many large and remarkable fishesof extinct groups. See the Diagram under Geology. Source: adambom
- 5. n. from 405 million to 345 million years ago; preponderance of fishes and appearance of amphibians and ammonites Source: ecdict
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