Zos·te·ra n. Bot. A genus of plants of the Naiadaceae, or Pondweed family. Zostera marina is commonly known as sea wrack, and eelgrass.
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sea wrack
n 1: submerged marine plant with very long narrow leaves found in
abundance along North Atlantic coasts [syn: eelgrass,
grass wrack, Zostera marina]
2: growth of marine vegetation especially of the large forms
such as rockweeds and kelp [syn: wrack]