Longman Dictionary of Contemporary English homepage

Topic: NATURE

Date: 1600-1700
Language: Latin
Origin: glacialis, from glacies 'ice'

glacial

adjective
     
gla‧cial
1SGHE relating to ice and glaciers, or formed by glaciers:
a glacial valley
glacial deposits
2 a glacial look or expression is extremely unfriendly [= icy]
3 extremely slow:
Change was coming, but at a glacial pace.
4DN extremely cold [= icy]:
a glacial wind
glacially adverb
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