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Meaning of koilonychia

koil•o•nych•i•a

Pronunciation: (koi"lō-nik'ē-u), [key]
— n. Med.
  1. an abnormal condition in which the outer surfaces of the nails are concave; spoon nail.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.