rockweed

Definitions of rockweed
  1. noun
    coarse brown seaweed growing on rocks exposed at low tide
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    types:
    fucus
    any member of the genus Fucus
    Fucus vesiculosus, black rockweed, bladder fucus, bladderwrack, tang
    a common rockweed used in preparing kelp and as manure
    Ascophyllum nodosum, bladderwrack
    similar to and found with black rockweed
    type of:
    brown algae
    algae having the chlorophyll masked by brown and yellow pigments
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