Pronunciation IPA (key): /ˈtɒksɪkənt/ Audio (UK)(file) Noun Singular toxicant Plural toxicants (countable) A toxicant is something that is toxic or poisonous. Adjective Positive toxicant Comparative more toxicant Superlative most toxicant If something is toxicant, it is able to do damage by poisoning. Related words toxic intoxicantWikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads