oarweed
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Related to oarweed: Laminaria digitata
oarweed
(ˈɔːˌwiːd)n
(Plants) any of various brown seaweeds, esp a kelp of the genus Laminaria, with long broad fronds, common below the low-water mark
[from earlier oreweed, from wore, from Old English wār seaweed + weed1]
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