As a Noun: 1. An ANTIEMETIC drug/medication that reduces nausea, i.e. If you are sea sick you can have an antiemetic. Note: 1. There appears to be no commonly used Auslan sign for ANTIEMETIC. If you know a sign for ANTIEMETIC used by you or other Auslan users (deaf people or interpreters) please go to "missing sign feedback" and supply details. Thank you.