glacier

A large mass of ice moving very slowly through a valley or spreading outward from a center. Glaciers form over many years from packed snow in areas where snow accumulates faster than it melts. A glacier is always moving, but when its forward edge melts faster than the ice behind it advances, the glacier as a whole shrinks backward.

Synonym: 
glaciers
Citation: 
glacier. (n.d.) The American Heritage® Science Dictionary. (2005). Retrieved November 18 2014 from http://www.thefreedictionary.com/glacier
English

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