: a genus of ferns that are related to and sometimes included in Pteris and that have in addition to the false indusium formed by the frond margin a true indusium on the inner side of the sori see bracken

Word History


New Latin, from Pterid-, Pteris + -ium

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Dictionary Entries Near Pteridium

Cite this Entry

“Pteridium.” Dictionary, Merriam-Webster, Accessed 24 Jul. 2024.

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