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Definition of Multifactorial

Multifactorial: In medicine, referring to multiple factors in heredity or disease. For example, traits and conditions that are caused by more than one gene occurring together are multifactorial, and diseases that are caused by more than one factor interacting (for example, heredity and diet in diabetes) are multifactorial.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=4452
Last Editorial Review: 3/19/2012

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