Aftertaste is defined by ASTM International1 as:
“aftertaste, n—the oral or nasal sensations that occur after the stimulus has been removed from the oral cavity. See After effects. (2007)”
References
1 ASTM International. 2009. Standard Terminology Relating to Sensory Evaluations of Materials and Products, E253-09a. ASTM International, West Conshohocken, PA.
E253-09a