tox‧in /ˈtɒksən, ˈtɒksɪn $ ˈtɑːk-/
noun [countable][
Date: 1800-1900;
Origin: toxic + -in 'chemical compound']
a poisonous substance, especially one that is produced by
bacteria and causes a particular disease ⇒
toxic [TahlilGaran] Dictionary of Contemporary English ▲