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[si-rak; French sey-rak] /sɪˈræk; French seɪˈrak/
noun, plural séracs
[si-raks; French sey-rak] /sɪˈræks; French seɪˈrak/ (Show IPA)
a large irregularity of glacial ice, as a pinnacle found in glacial crevasses and formed by melting or movement of the ice.
Also, serac.
Origin of sérac
1855-60; < French sérac kind of white cheese (compare Medieval Latin serācium), ultimately < Latin serum whey Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for serac


a pinnacle of ice among crevasses on a glacier, usually on a steep slope
Word Origin
C19: from Swiss French: a variety of white cheese (hence the ice that it resembles) from Medieval Latin serācium, from Latin serum whey
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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