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From Biology-Online Dictionary | Biology-Online Dictionary
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(Science: botany) a seaweed of a reddish brown colour, which is sometimes eaten, as in Scotland. The true dulse is Sarcophyllis edulis; the common is Rhodymenia.

alternative forms: dillisk] The crimson leaf of the dulse is seen to blush like a banner bathed in slaughter. (Percival)

Origin: cf. Gael. Duileasg; duille leaf _ uisge water. Cf. Whisky.