cyperus rotundus

nutgrass \nut"grass`\, nut grass \nut" grass`\, n.(Bot.), A widely distributed perennial plant of the Sedge family (Cyperus rotundus, var. Hydra), which has slender rootstocks bearing small, edible, nutlike tubers, by which the plant multiplies exceedingly, especially in cotton fields.

nutsedge \nutsedge\, nut sedge \nut sedge\n. a widely distributed perennial sedge (Cyperus rotundus) having small edible nutlike tubers; also called nut grass.