Lewis Short
purgāmentum (noun N) : id..
* What is swept or washed off, sweepings, offscourings, filth, dirt: cloacam maximam, receptaculum omnium purgamentorum urbis,Liv. 1, 56: hortorum,Tac. A. 11, 32: cenae in pavimento,Plin. 36, 25, 60, § 184: ceparum,id. 20, 5, 20, § 41: oris,Sen. Const. 2 fin.: sanguinis,Plin. 11, 37, 74, § 192.—As a term of reproach, refuse, dregs, filth, offscouring, outcast, Petr. 74; Curt. 6, 11, 2; 10, 2, 7: purgamenta pro frugibus creat humus palustris,weeds,Sen. Ep. 73, 16.
* Transf., washings, that which is washed up: purgamenta freti aestuantis,i.e. pearls,Col. 8, 9, 19: tanquam purgamenta hujus mundi,Vulg. 1 Cor. 4, 13.
* A means of purgation, purification, or expiation, an expiatory sacrifice, Petr. 134, 1.
Charlton T. Lewis, Charles Short, A Latin Dictionary