'Glaciation' definitions:

Definition of 'glaciation'

From: WordNet
noun
The condition of being covered with glaciers or masses of ice; the result of glacial action; "Agassiz recognized marks of glaciation all over northern Europe"
noun
The process of covering the earth with glaciers or masses of ice

Definition of 'Glaciation'

From: GCIDE
  • Glaciation \Gla`ci*a"tion\, n.
  • 1. Act of freezing. [1913 Webster]
  • 2. That which is formed by freezing; ice. [1913 Webster]
  • 3. The process of glaciating, or the state of being glaciated; the production of glacial phenomena. [1913 Webster]