Fern

имя существительное [ботаника] папоротник

Большой англо-русский словарь

Fern

noun Etymology: Middle English, from Old English fearn; akin to Old High German farn fern, Sanskrit parṇa wing, leaf any of a division (Filicophyta) or class (Filicopsida) of flowerless spore-producing vascular plants having alternating sporophyte and gametophyte generations; especially any of an order (Filicales) of homosporous plants possessing roots, stems, and leaflike fronds — compare seed fernfernlike adjectiveferny adjective

Merriam-Webster's Collegiate Dictionary