Al·​e·​thop·​ter·​is | \ ˌa-lə-ˈthäp-tə-rəs \

Definition of Alethopteris

: a genus of large fossil seed ferns represented by abundant remains in Carboniferous coal measures and having large bipinnate to tripinnate fronds with the thick pinnules being inserted on the rachis by a broad decurrent base

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Other Words from Alethopteris

alethopteroid \ ¦a-​lə-​¦thäp-​tə-​ˌrȯid \ adjective

First Known Use of Alethopteris

circa 1847, in the meaning defined above

History and Etymology for Alethopteris

New Latin, from Greek alētho- (from alēthēs true) + New Latin -pteris

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The first known use of Alethopteris was circa 1847

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Cite this Entry

“Alethopteris.” Dictionary, Merriam-Webster, Accessed 2 Mar. 2021.

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