催さい吐と薬やくさいとやくMeanings1nounemeticMedical term for a substance that induces vomiting. The synonym 吐剤 (とざい) is also used.See also: 吐剤中ちゅう毒どく患かん者じゃに催さい吐と薬やくを投とう与よした。An emetic was administered to the poisoned patient.