from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A Eurasian perennial herb (Polygonum bistorta) having cylindrical spikes of usually pink flowers and a rhizome used as an astringent in folk medicine.
- n. Any of certain related plants of the genus Polygonum.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any of several perennial herbs, variously classified, having spikes of pink flowers
from the GNU version of the Collaborative International Dictionary of English
- n. An herbaceous plant of the genus Polygonum, section Bistorta; snakeweed; adderwort. Its root is used in medicine as an astringent.
from The Century Dictionary and Cyclopedia
- n. A plant, Polygonum Bistorta, so called because of its twisted roots: popularly called snakeweed and adder's-wort.
French bistorte, from Old French, from Medieval Latin *bistorta : Latin bis, twice; see bis + torta, past participle of torquēre, to twist; see torque1.(American Heritage® Dictionary of the English Language, Fourth Edition)