multifactorial

(mŭlˌtə-făk-tôrˈē-əl, -tōrˈ-)

1. Involving, dependent on, or controlled by several factors.
2. Of, relating to, or caused by a pattern of familial inheritance resulting from multiple genetic or environmental factors or from a combination of both.

Related Forms:

• mulˌti·fac·torˈi·al·ly adverb