Rockweed

n.

1.

(Bot.) Any coarse seaweed growing on sea-washed rocks, especially Fucus.

Noun

1.

rockweed - coarse brown seaweed growing on rocks exposed at low tide

Ascophyllum nodosum, black rockweed, bladder fucus, bladderwrack, brown algae, family Fucaceae, Fucaceae, fucus, Fucus vesiculosus, tang