The Collaborative International Dictionary
Wrack grass
Wrack \Wrack\, n. [OE. wrak wreck. See Wreck.]
Wreck; ruin; destruction. [Obs.]
--Chaucer. ``A world devote to universal wrack.''
--Milton.Any marine vegetation cast up on the shore, especially plants of the genera Fucus, Laminaria, and Zostera, which are most abundant on northern shores.
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(Bot.) Coarse seaweed of any kind.
Wrack grass, or Grass wrack (Bot.), eelgrass.