purificatio
From LSJ
Ἐς δὲ τὰ ἔσχατα νουσήματα αἱ ἔσχαται θεραπεῖαι ἐς ἀκριβείην, κράτισται → For extreme diseases, extreme methods of cure, as to restriction, are most suitable.
Latin > English (Lewis & Short)
pūrĭfĭcātĭo: ōnis, f. purifico,
I a purifying, purification (post-Aug.): laurus purificationibus adhibetur, Plin. 15, 30, 40, § 138: religionis, Mart. 8 praef.: sanguis purificationis suae, Vulg. Lev. 12, 4: purificatio, καθαρμός>, Gloss. Cyril.