Pep·per·grass n. Bot. (a) Any herb of the cruciferous genus Lepidium, especially the garden peppergrass, or garden cress, Lepidium sativum; -- called also pepperwort. All the species have a pungent flavor. (b) The common pillwort of Europe (Pilularia globulifera). See Pillwort.

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 Cress n.; pl. Cresses   Bot. A plant of various species, chiefly cruciferous. The leaves have a moderately pungent taste, and are used as a salad and antiscorbutic.
 Note: ☞ The garden cress, called also peppergrass, is the Lepidium sativum; the water cress is the Nasturtium officinale. Various other plants are sometimes called cresses.
    To strip the brook with mantling cresses spread.   --Goldsmith.
 Bitter cress. See under Bitter.
 Not worth a cress, or not worth a kers.” a common old proverb, now turned into the meaningless “not worth a curse.”

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 Lepidium sativum
      n : annual herb used as salad green and garnish [syn: {common
          garden cress, garden pepper cress, pepper grass, pepperwort]