sea tang

from WordNet (r) 3.0 (2006)

sea tang
    n 1: any of various coarse seaweeds [syn: {tang}, {sea tang}]

from The Collaborative International Dictionary of English v.0.48

Sea tang \Sea" tang`\ (Bot.)
   A kind of seaweed; tang; tangle.
   [1913 Webster]

         To their nests of sedge and sea tang.    --Longfellow.
   [1913 Webster]