gla·cier

[gley-sher]
noun
an extended mass of ice formed from snow falling and accumulating over the years and moving very slowly, either descending from high mountains, as in valley glaciers, or moving outward from centers of accumulation, as in continental glaciers.

Origin:
1735–45; < dialectal French, derivative of Old French glace ice < Late Latin glacia (for Latin glaciēs)

gla·ciered, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
glacier (ˈɡlæsɪə, ˈɡleɪs-) [Click for IPA pronunciation guide]
 
n
a slowly moving mass of ice originating from an accumulation of snow. It can either spread out from a central mass (continental glacier) or descend from a high valley (alpine glacier)
 
[C18: from French (Savoy dialect), from Old French glace ice, from Late Latin glacia, from Latin glaciēs ice]

Collins English Dictionary - Complete & Unabridged 10th Edition
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00:10
Glaciers is always a great word to know.
So is interrobang. Does it mean:
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
Etymonline
Word Origin & History

glacier
1744, from Fr. glacier, from Savoy dialect glacière "moving mass of ice," from O.Fr. glace "ice," from L. glacies (see glacial).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
glacier   (glā'shər)  Pronunciation Key 
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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary

glacier definition


A large mass of ice formed over many years that does not melt during the summer. Glaciers move slowly over an area of land such as a mountain valley.

Note: Glaciers exist in high mountains throughout the temperate zones and cover most of Antarctica. Glaciers recede during warm periods and can expand during cold periods, creating ice ages.
Note: A significant percentage of the water of the Earth is locked up in glaciers.
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
Polar bears are flourishing, glaciers are not melting worldwide, sea levels are
  stable.
Some glaciers have doubled or tripled their speed recently, possibly because of
  human-induced climate change.
They did this by studying the natural records of climate in tree rings, ice
  cores from glaciers, and coral reefs.
The ice cap is not the remains of glaciers, never mind yearly, seasonal
  turnover rates.
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