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
genusof fossil ferns, of which species have been found from the Devonianto the Triassicformation.
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