Alethopteris
noun
Al·e·thop·ter·is
ˌa-lə-ˈthäp-tə-rəs
: 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
alethopteroid adjective
¦a-lə-¦thäp-tə-ˌrȯid
Word History
Etymology
New Latin, from Greek alētho- (from alēthēs true) + New Latin -pteris
First Known Use
circa 1847, in the meaning defined above