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Meaning of arcuation

ar•cu•a•tion

Pronunciation: (är"ky-ā'shun), [key]
— n.
  1. the state of being bent or curved.
  2. the use of arches in building.
  3. a system or grouping of arches.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.