Source : Webster's Revised Unabridged Dictionary (1913)

Saltwort \Salt"wort`\, n. (Bot.)
   A name given to several plants which grow on the seashore, as
   the {Batis maritima}, and the glasswort. See {Glasswort}.

   {Black saltwort}, the sea milkwort.

Source : WordNet®

saltwort
     n 1: bushy plant of Old World salt marshes and sea beaches having
          prickly leaves; burned to produce a crude soda ash [syn:
           {barilla}, {glasswort}, {kali}, {kelpwort}, {Salsola
          kali}, {Salsola soda}]
     2: low-growing strong-smelling coastal shrub of warm parts of
        the New World having unisexual flowers in conelike spikes
        and thick succulent leaves [syn: {Batis maritima}]