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wall fern

American  

noun

  1. the polypody, especially Polypodium vulgare or P. virginianum.

Etymology

Origin of wall fern

First recorded in 1515–25

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.