Zostera

from WordNet (r) 3.0 (2006)

Zostera
    n 1: (or in some classifications family Zosteraceae) small genus
         of widely distributed marine plants [syn: {Zostera}, {genus
         Zostera}]

from The Collaborative International Dictionary of English v.0.48

Zostera \Zos"te*ra\, n. [NL.] (Bot.)
   A genus of plants of the {Naiadaceae}, or Pondweed family.
   {Zostera marina} is commonly known as {sea wrack}, and
   {eelgrass}.
   [1913 Webster]