Pronunciation IPA (key): /ˌtɒksɪˈkəʊsɪs/ Audio (UK)(file) Noun Singular toxicosis Plural toxicoses (countable) A toxicosis is an illness that was caused by a toxin or something toxic or poisonous. Related words toxic toxicity This section needs someone to add example sentences to it. Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads