Longman Dictionary of Contemporary English homepage

Date: 1800-1900
Origin: toxic + -in 'chemical compound'

toxin

 noun
     
Related topics: Microbes, Genetics, Biochem
tox‧in [countable]
HBM a poisonous substance, especially one that is produced by bacteria and causes a particular disease
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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