diluvium: Meaning and Definition of

di•lu•vi•um

Pronunciation: (di-l'vē-um), [key]
— pl. -vi•a -vi•ums.
  1. a coarse surficial deposit formerly attributed to a general deluge but now regarded as glacial drift.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.