Hair grass

from WordNet (r) 3.0 (2006)

hair grass
    n 1: fine-leaved aquatic spike rush; popular as aerator for
         aquariums [syn: {needle spike rush}, {needle rush},
         {slender spike rush}, {hair grass}, {Eleocharis
         acicularis}]

from The Collaborative International Dictionary of English v.0.48

Hair grass \Hair" grass`\ (gr[.a]s`). (Bot.)
   A grass with very slender leaves or branches; as the
   {Agrostis scabra}, and several species of {Aira} or
   {Deschampsia}.
   [1913 Webster]

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