noun Pte·rid·i·um \təˈridēəm, teˈr-\

Definition of Pteridium

  1. :  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

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Origin and Etymology of pteridium

New Latin, from Pterid-, Pteris + -ium

Seen and Heard

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a trip made at another's expense

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