IPA: //ˌpoʊstˈstɪmjʊləs//
KK: /ˈpoʊstˌstɪm.jə.ləs/
Describing something that occurs after a stimulus has been applied or experienced.
The poststimulus response was measured to assess the effects of the treatment.
Poststimulus → It is formed from "post-" (meaning after) and "stimulus" (from Latin, meaning a goad or incentive). The word refers to something that occurs after a stimulus or an event that provokes a response.
Think of something happening 'after' ('post-') a 'stimulus' or trigger — that's what poststimulus means.