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Definition of Formication

Formication: The illusion or hallucination that ants or other insects are creeping on or under the skin. Formication is a feature of some psychotic states as well as drug and alcohol abuse. From the Latin formicatio, from formicare meaning to creep like an ant. Not to be confused with fornication.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=26008
Last Editorial Review: 6/14/2012

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