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®

Batis maritima
     n : low-growing strong-smelling coastal shrub of warm parts of
         the New World having unisexual flowers in conelike spikes
         and thick succulent leaves [syn: {saltwort}]