I. Lit., white and viscous matter of a sore, pus, Cels. 5, 26, 20; 5, 28, 8.—In plur.: “pura,” Plin. 24, 16, 92, § 145; 35, 6, 21, § 38.—
II. Transf., as designation of a malicious person: Titus Lucius ... febris, senium, vomitum, pus, Lucil. ap. Non. 2, 31: “Rupili pus atque venenum,” Hor. S. 1, 7, 1.