Source : Webster's Revised Unabridged Dictionary (1913)

Zostera \Zos"te*ra\, n. [NL.] (Bot.)
   A genus of plants of the {Naiadace[ae]}, or Pondweed family.
   {Zostera marina} is commonly known as {sea wrack}, and
   {eelgrass}.

Source : WordNet®

Zostera
     n : (or in some classifications family Zosteraceae) small genus
         of widely distributed marine plants [syn: {genus Zostera}]