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Meaning of sérac

sé•rac

Pronunciation: (si-rak' Fr. sā-rak'), [key]
— pl. -racs
  1. a large irregularity of glacial ice, as a pinnacle found in glacial crevasses and formed by melting or movement of the ice.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.