Definitions

from The Century Dictionary.

  • noun A genus of fossil ferns, established by Brongniart in 1828, very widely distributed, especially characteristic of the coal-measures (of Carboniferous age) in different parts of the world, and not passing above the Permian.

from the GNU version of the Collaborative International Dictionary of English.

  • proper noun (Paleon.) An extensive genus of fossil ferns, of which species have been found from the Devonian to the Triassic formation.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • proper noun A taxonomic genus of fossil ferns, of which species have been found from the Devonian to the Triassic formation.

Etymologies

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Examples

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