The Collaborative International Dictionary of English v.0.48:
Purulent \Pu"ru*lent\, a. [L. purulentus, fr. pus, puris, pus, matter: cf. F. purulent. See Pus.] (Med.) Consisting of pus, or matter; partaking of the nature of pus; attended with suppuration; as, purulent inflammation. [1913 Webster]WordNet (r) 3.0 (2006):
purulent adj 1: containing pus; "a purulent wound" [syn: purulent, pussy]