noun
gibbous duckweed; swollen duckweed; fat duckweed
A rare term for the aquatic plant Lemna gibba, typically written in katakana as イボウキクサ. Used in botanical contexts.
イボウキクサは水面に浮かぶ小さな植物です。
Gibbous duckweed is a small plant that floats on the water surface.
The name イボウキクサ (疣浮草) literally means 'wart duckweed', likely from the swollen, wart-like appearance of the fronds. The exact derivation is uncertain.