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British Dictionary definitions for oarweed

oarweed

noun
  1. any of various brown seaweeds, especially a kelp of the genus Laminaria, with long broad fronds, common below the low-water mark
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Word Origin

from earlier oreweed, from wore, from Old English wār seaweed + weed 1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012