pūrgātĭō, ōnis, f. (purgo),

¶ 1 nettoyage, curage : Plin. Min. Ep. 10, 32, 2 ||
menstrua Plin. 32, 131, menstrues ||
purgation : Cato Agr. 157, 13 ; Cic. Fam. 16, 10, 1

¶ 2 [fig.] excuse, justification : Ter. Haut. 625 ; Cic. Inv. 1, 15 ||
expiation : Plin. 15, 135.