BISTORT

bistort. Bistort, n. knot-grass of many species

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Bis″tort (�), n. [[L. bis + tortus, p. p. of torquere to twist: cf. F. bistorte.]] (Bot.) An herbaceous plant of the genus Polygonum, section Bistorta; snakeweed; adderwort. Its root is used in medicine as an astringent.