mosquito fern

Từ điển Oxford Learners Wordfinder Dictionary

noun

small free-floating aquatic fern from the eastern United States to tropical America;
naturalized in western and southern Europe
• Syn:
floating fern, Carolina pond fern, Azolla caroliniana
• Hypernyms:
aquatic fern, water fern
• Member Holonyms:
Azolla, genus Azolla