nut sedge

from WordNet (r) 3.0 (2006)

nut sedge
    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

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]