rockweed

[ rok-weed ]
/ ˈrɒkˌwid /

noun

a fucoid seaweed growing on rocks exposed at low tide.

Origin of rockweed

First recorded in 1620–30; rock1 + weed1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for rockweed

rockweed

/ (ˈrɒkˌwiːd) /

noun

any of various seaweeds that grow on rocks exposed at low tide
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