| polypodium | a genus of ferns belonging to the family Polypodiaceae and having rounded naked sori |
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| polypodium | tropical American fern with brown scaly rhizomes cultivated for its large deeply lobed deep bluish-green fronds |
| polypodium | fern having rootstock of a sweetish flavor |
| polypodium | fern growing on rocks or tree trunks and having fronds grayish and scurfy below |
| polypodium | stiff leathery-leaved fern of western North America having ovate fronds parted to the midrib |
| polypodium | chiefly lithophytic or epiphytic fern of North America and east Asia |
| polypodium | mat-forming lithophytic or terrestrial fern with creeping rootstocks and large pinnatifid fronds found throughout North America and Europe and Africa and east Asia |