| spirodela | (n) minute aquatic herbs floating on the water surface consisting of a shiny leaflike frond and 2-21 roots, Syn. genus Spirodela |
| great duckweed | (n) cosmopolitan except South America and New Zealand and some oceanic islands, Syn. Spirodela polyrrhiza, water flaxseed |
| 浮き草;浮草;浮き萍;萍 | [うきくさ, ukikusa] (n) (1) floating weed; (2) (uk) greater duckweed (Spirodela polyrhiza); (adj-no) (3) precarious; unstable [Add to Longdo] |