adjective, fern·i·er, fern·i·est.
  1. pertaining to, consisting of, or like ferns: ferny leaves.
  2. abounding in or overgrown with ferns: ferny undergrowth.

Origin of ferny

First recorded in 1515–25; fern + -y1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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Historical Examples of ferny