Cyperus rotundus

from WordNet (r) 3.0 (2006)

Cyperus rotundus
    n 1: a widely distributed perennial sedge having small edible
         nutlike tubers [syn: {nutgrass}, {nut grass}, {nutsedge},
         {nut sedge}, {Cyperus rotundus}]

from The Collaborative International Dictionary of English v.0.48

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.

   Syn: nutsedge, nut sedge, {Cyperus rotundus}.
        [1913 Webster + WordNet 1.5]

from The Collaborative International Dictionary of English v.0.48

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

   Syn: nutgrass, nut grass, {Cyperus rotundus}.
        [WordNet 1.5]

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