e·lu·tri·ate 
(
ĭ-l
tr
ē-
āt
′)
tr.v. e·lu·tri·at·ed,
e·lu·tri·at·ing,
e·lu·tri·ates 1. To purify, separate, or remove (ore, for example) by washing, decanting, and settling.
2. To wash away the lighter or finer particles of (soil, for example).
[Latin elutriāre, elutriāt- (from *elutrium, vat, bath, from Greek *elutrion, diminutive of elutron, cover, sheath, tank; see ELYTRON) or ēlūtriāre (from *ēlūtor, one who washes, from ēluere, to wash out; see ELUTE).]
e·lu′tri·ation n.