sword fern definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
any of various ferns with sword-shaped leaves; esp., a giant fern (Nephrolepis biserrata) of S Florida, with pinnate leaves
sword fern definition by American Heritage Dictionary
Any of various ferns of the genus Nephrolepis, including the Boston fern, having bipinnately compound fronds and sori at the vein tips.