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Definition of Pachyonychia

Pachyonychia: Elephant nail, a fingernail or toenail that is abnormally thick. From the Greek pachys, thick + onyx, nail = thick nail.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=20450
Last Editorial Review: 6/14/2012

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