ēlŭvĭo, ōnis, f. [eluo], older form of eluvies,
a washing away , overflowing , inundation : aquarum eluviones, Cic. Div. 1, 49, 111: eluviones et exustiones terrarum, Cic. Rep. 6, 21, 23; id. Off. 2, 5, 16.
ēluviō ōnis, f ex + 3 LV-, an overflow, inundation : aquarum: terrarum. ...
An Elementary Latin Dictionary