- any of numerous ferns of the genera Dryopteris and Polystichum, having shield-shaped indusia.
Origin of shield fern
First recorded in 1805–15
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- any temperate woodland fern of the genus Polystichum having shield-shaped flaps covering the spore-producing bodies: family Aspleniaceae
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012