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Definition of Dia-

Dia-: Prefix meaning through, throughout, or completely, as in diachronic (over a period of time), diagnosis (to completely define the nature of a disease), and dialysis (cleansing the blood by passing it through a special machine).

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=2971
Last Editorial Review: 3/19/2012

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