Noun sea wrack has 2 senses
  1. eelgrass, grass wrack, sea wrack, Zostera marina - submerged marine plant with very long narrow leaves found in abundance along North Atlantic coasts
    --1 is a kind of aquatic plant, water plant, hydrophyte, hydrophytic plant
    --1 is a member of Zostera, genus Zostera
  2. sea wrack, wrack - growth of marine vegetation especially of the large forms such as rockweeds and kelp
    --2 is a kind of seaweed
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