Definition of goldthread in English:

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goldthread

Pronunciation: /ˈɡōldTHred/

noun

A plant of the buttercup family that yields a yellow dye and is used in herbal medicine as a treatment for mouth ulcers. It grows in North America and northeastern Asia.
  • Genus Coptis, family Ranunculaceae: several species, in particular C. groenlandica and C. trifolia
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