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)