adder's tongue fern

Từ điển WordNet v3.1 - WordNet Dictionary

noun

ferns with fertile spikes shaped like a snake's tongue
• Syn:
adder's tongue
• Hypernyms:
fern
• Hyponyms:
ribbon fern, Ophioglossum pendulum
• Member Holonyms:
Ophioglossum, genus Ophioglossum