Definition of 黒慈姑 (くろぐわい)

noun
1.
Eleocharis kuroguwai (species of spikerush)(usually kana)
2.
Chinese water chestnut (Eleocharis dulcis var. tuberosa)(usually kana)
See also:大黒慈姑
Other readings:
クログワイ
Related Kanji
black
mercy
mother-in-law