"cockleburs" in the noun sense
1. cocklebur, cockle-bur, cockleburr, cockle-burr
any coarse weed of the genus Xanthium having spiny burrs
2. great burdock, greater burdock, cocklebur, Arctium lappa
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
Source: WordNet® (An amazing lexical database of English)
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