after-effect

noun

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

noun

1. any result occurring some time after its cause
2. med any delayed response to a stimulus or agentCompare side effect
3. psychol any illusory sensation caused by a stimulus that has ceased