af·ter·ef·fect noun \ˈaf-tə-ri-ˌfekt\
: an effect that follows its cause after an interval <the aftereffects of surgery>
: a secondary result especially in the action of a drug coming on after the subsidence of the first effect
Seen & Heard
What made you want to look up aftereffect? Please tell us where you read or heard it (including the quote, if possible).