Any of several coarse, brownish seaweeds of the genera Fucus and Ascophyllum that grow on rocks in coastal areas.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "rockweed" in a sentence
"When gathering your equipment, look for rockweed—it's the best seaweed for clambakes because its seawater-filled pockets burst during cooking and add brininess and moisture to the other ingredients."
"Monaghan clambakes were all-day affairs, beginning early with the gathering of rockweed, stones and driftwood."
"In a pinch, try buying rockweed from your fishmonger; it's used to pack shellfish and is often abundant where seafood is sold."