Source : Webster's Revised Unabridged Dictionary (1913)

   {Scurvy grass} [Scurvy + grass; or cf. Icel. skarfak[=a]l
      scurvy grass.] (Bot.) A kind of cress ({Cochlearia
      officinalis}) growing along the seacoast of Northern
      Europe and in arctic regions. It is a remedy for the
      scurvy, and has proved a valuable food to arctic
      explorers. The name is given also to other allied species
      of plants.

Source : WordNet®

scurvy grass
     n 1: a widely distributed arctic cress reputed to have value in
          treatment or prevention of scurvy; a concentrated source
          of vitamin C [syn: {common scurvy grass}, {Cochlearia
          officinalis}]
     2: any plant of the genus Barbarea: yellow-flowered Eurasian
        cresses; widely cultivated for winter salad [syn: {winter
        cress}, {St. Barbara's herb}]