/pol"ee poh'dee/ , n. , pl. polypodies .
any fern of the genus Polypodium, as P. vulgare, having creeping rootstocks, deeply pinnatifid evergreen fronds, and round, naked sori.
[ 1400-50; late ME polypodye polypodion polypódion ( > NL Polypodium ); see POLY-, -POD, -IUM ]