"vessel used in chemistry for distilling or effecting decomposition by the aid of heat," c. 1600, from Middle French retorte, from Medieval Latin *retorta "a retort, a vessel with a bent neck," literally "a thing bent or twisted," from past participle stem of Latin retorquere "turn back, twist back, throw back," from re- "back" (see re-) + torquere "to twist" (from PIE root *terkw- "to twist").