aftereffect

[ af-ter-i-fekt, ahf- ]
/ ˈæf tər ɪˌfɛkt, ˈɑf- /

noun

a delayed effect; an effect that follows at some interval after the stimulus that produces it.
Medicine/Medical. a result appearing after the first effect due to an agent, usually a drug, has gone.

Origin of aftereffect

First recorded in 1810–20; after + effect

British Dictionary definitions for aftereffect

aftereffect
/ (ˈɑːftərɪˌfɛkt) /

noun

any result occurring some time after its cause
med any delayed response to a stimulus or agent Compare side effect
psychol any illusory sensation caused by a stimulus that has ceased