Hypertext Webster Gateway: "rockweed"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Rockweed \Rock"weed`\, n. (Bot.)
Any coarse seaweed growing on sea-washed rocks, especially
Fucus.
From WordNet (r) 1.7 (wn)
rockweed
n : coarse brown seaweed growing on rocks exposed at low tide
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