a North American woodland ranunculaceous plant, Coptis trifolia (or C. groenlandica), with slender yellow roots
2.
the root of this plant, which yields a medicinal tonic and a dye
goldthread in American English
(ˈgoʊldˌθrɛd)
noun
US
any of a genus (Coptis) of North American plants of the buttercup family, esp. a small perennial (C. groenlandica) with white flowers and yellow rhizomes, used in folk medicine
Examples of 'goldthread' in a sentence
goldthread
But there were flowers, too: violets and goldthread and others that I had never seen before.
David Zindell THE LIGHTSTONE: BOOK ONE, PART ONE OF THE EA CYCLE (2002)