Main Entry: ¹re·sid·u·al

Pronunciation: \ri-ˈzi-jə-wəl, -jəl; -ˈzij-wəl\

Function: noun

Etymology: Latin residuum residue

Date: 1557

1 : remainder, residuum: as a : the difference between results obtained by observation and by computation from a formula or between the mean of several observations and any one of them b : a residual product or substance c : an internal aftereffect of experience or activity that influences later behavior; especially : a disability remaining from a disease or operation
2 : a payment (as to an actor or writer) for each rerun after an initial showing (as of a TV show)