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diluvium

or di·lu·vi·on

[dih-loo-vee-uh m]
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noun, plural di·lu·vi·a [dih-loo-vee-uh] /dɪˈlu vi ə/, di·lu·vi·ums. Geology Now Rare.
  1. a coarse surficial deposit formerly attributed to a general deluge but now regarded as glacial drift.

Origin of diluvium

1810–20; < Latin dīluvium flood; see deluge
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for diluvia

diluvium

noun plural -via (-vɪə)
  1. geology a former name for glacial driftSee drift (def. 12)

Word Origin

C19: from Latin: flood, from dīluere to wash away; see dilute
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012