A type of edible seaweed or sea plant, also known as sea lettuce or dulse, used in coastal cuisine.
From Middle English, possibly combining cad- (uncertain origin) + weed (water plant). The term is used primarily in British and Irish coastal regions.
Cadweed is basically seaweed that's actually tasty and nutritious—it's been used in Irish and Welsh coastal cooking for centuries, rich in iodine long before people knew about vitamins.
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