Main Entry: fac·tor

Pronunciation: \ˈfak-tər\

Function: noun

1 a : something that actively contributes to the production of a result b : a substance that functions in or promotes the function of a particular physiological process or bodily system
2 : gene

—fac·to·ri·al \fak-ˈtōr-ē-əl, -ˈtȯr-\ adjective