Lewis & Short

tordylĭon, ii, or tordylon, i, n., = τορδύλιον or τόρδυλον, acc. to some, the seed of the plant seselis; acc. to others, a plant, hartwort: Tordylium officinale or maximum, Plin. 20, 22, 87, § 238; 24, 19, 117, § 177.