Blood·wort n. Bot. A plant, Rumex sanguineus, or bloody-veined dock. The name is applied also to bloodroot (Sanguinaria Canadensis), and to an extensive order of plants (Hæmodoraceæ), the roots of many species of which contain a red coloring matter useful in dyeing.
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bloodwort
n : any of various plants of the family Haemodoraceae; roots
contain a deep red coloring matter