Main Entry: de·nom·i·na·tor

Pronunciation: \di-ˈnä-mə-ˌnā-tər\

Function: noun

Date: circa 1542

1 : the part of a fraction that is below the line and that functions as the divisor of the numerator
2 a : a shared trait <a common denominator> b : the average level (as of taste or opinion) : standard