κᾰθαρμός · katharmos — LSJ
cleansing, purification, from guilt, νίψαι καθαρμῷ τήνδε τὴν στέγην S. OT 1228: hence, purificatory offering, atonement, expiation, καθαρμὸν τῆς χώρης ποιέεσθαί τινα Hdt. 7.197: freq. in pl., μύσος ἐλαύνειν καθαρμοῖς A. Ch. 968 (lyr., dub. l.), cf. Th. 738, Eu. 277, 283, Berl.Sitzb. 1927.156 (Cyrene): sg., S. OT 99; θοῦ νῦν καθαρμὸν δαιμόνων make an offering to avert their wrath, Id. OC 466; καθαρμὸν θύειν E. IT 1332; λύσεις τε καὶ καθαρμοὶ ἀδικημάτων Pl. R. 364e; ὁ περὶ τὴν διάνοιαν κ. Id. Sph.
purificatory rite of initiation into mysteries, Pl. Phd. 69c, Phdr. 244e; ἀνιστὰς ἀπὸ τοῦ καθαρμοῦ D. 18.259, cf. Plu. Aud. 2.47a: hence in pl., as title of poem by Empedocles, Ath. 14.620d; by Epimenides, Suid. s.h.v.
purgation by ordeal, PMag.Lond. 46.180,196.
purging, evacuation, discharge, Arist. HA 587b1, Plu. Sanit. 2.134d.
metaph., purge, clearance of unhealthy animals, Pl. Lg. 735b.
= κάθαρμα I.2, Plu. Curios. 2.518b.