oak fern


Definition of oak fern

: a widely distributed fern (Thelypteris dryopteris) of the family Polypodiaceae chiefly of damp acid woodlands of boreal and alpine parts of the northern hemisphere that has a slender subterraneous rhizome and delicate solitary triangular fronds

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History and Etymology for oak fern

translation of Latin dryopteris

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Cite this Entry

“Oak fern.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/oak%20fern. Accessed 27 January 2020.

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