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Noun: adder's tongue fern
  1. Ferns with fertile spikes shaped like a snake's tongue
    "The adder's tongue fern's unique fertile frond gave it its serpentine name";
    - adder's tongue

Derived forms: adder's tongue ferns

Type of: fern

Part of: genus Ophioglossum, Ophioglossum

Encyclopedia: Adder's tongue fern