Origin of bistortMiddle French bistorte from Old French from Medieval Latin bistorta, literally , twice twisted from Classical Latin bis, double (see binary) + tortus, past participle of torquere, to twist
any of several perennial northern and alpine plants (genus Polygonum) of the buckwheat family, whose twisted roots furnish an astringent
Any of several plants of the family Polygonaceae, especially the Eurasian perennial herb Persicaria bistorta (syn. Polygonum bistorta ), having spikes of usually pink flowers and twisted roots used as an astringent in folk medicine.
Origin of bistortFrench bistorte from Old French from Medieval Latin bistorta Latin bis twice ; see bis . torta past participle of torquēre to twist ; see torque 1.