noun Date: 1775 a perennial sedge ( Cyperus rotundus ) of wide distribution that has slender rootstocks bearing small edible tubers resembling nuts
NUT GRASS
Meaning of NUT GRASS in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012