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Noun: horsetail  'hors,teyl
  1. Perennial rushlike flowerless herbs with jointed hollow stems and narrow toothlike leaves that spread by creeping rhizomes; tend to become weedy; common in northern hemisphere; some in Africa and South America

Derived forms: horsetails

Type of: fern ally

Part of: Equisetum, genus Equisetum

Encyclopedia: Horsetail