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.

noun plural -via (-vɪə)

  1. geology a former name for glacial driftSee drift (def. 12)

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