Definition of "grape fern" [grape fern]

• Any of various ferns of the genus Botrychium, having a fertile frond bearing small, grapelike clusters of spore cases. Also called moonwort. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.