noun
prickly waterlily; Euryale ferox
An aquatic plant with large, spiny leaves; the name literally means 'demon lotus'.
オニバスは池の水面に大きな葉を広げる。
The prickly waterlily spreads its large leaves over the surface of the pond.
The name オニバス combines 鬼 (oni, 'demon') and 蓮 (hasu, 'lotus'), referring to the plant's large, thorny appearance. The exact historical derivation is uncertain.