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Venus hairor Venus' hair also Venus's hair
A maidenhair fern (Adiantum capillus-veneris) of warm moist calcareous regions, having slender blackish stalks and bipinnately compound fronds.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.