nauseant

adj. causing nausea; arousing stomach sickness

n. substance that causes nausea, substance that causes an upset stomach

A nauseant is a substance or an agent that is used to generate the tendency to vomit.  Tobacco and egg white are nauseous to children, and produce sickness at the stomach. Nauseants are akin to direct emetics.
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Noun
1. a medicine that induces nausea and vomiting
(synonym) emetic, vomit, vomitive
(hypernym) remedy, curative, cure
(hyponym) ipecac
(derivation) sicken, nauseate, turn one's stomach

(n.)
A substance which produces nausea.
  

adj.
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