(noun) any coarse weed of the genus Xanthium having spiny burrs. Synonyms: cockle-bur, cockleburr, cockle-burr.
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Noun Definition 1
(noun) burdock having heart-shaped leaves found in open woodland, hedgerows and rough grassland of Europe (except extreme N) and Asia Minor; sometimes cultivated for medicinal and culinary use. Synonyms: great burdock, greater burdock, Arctium lappa.