IPA: //ˈstɜrn.jʊˌteɪ.tər//
KK: /ˈstɜrn.jʊˌteɪ.tər/
A substance that causes sneezing and may also lead to tearing and coughing.
The doctor used a sternutator to test the patient's allergic reactions.
Sternutator → It is formed from "sternutare" (meaning to sneeze) and the suffix "-or" (meaning one who). The word "sternutator" refers to one who causes sneezing or a substance that induces sneezing.
Think of someone or something that makes you 'sneeze' ('sternutare') — that's why a 'sternutator' is related to causing sneezing.