Longman Dictionary of Contemporary English homepage

Date: 1300-1400
Language: Latin
Origin: arsenicum, from Greek arsenikon yellow mineral from which arsenic is obtained, from Syriac zarnig

arsenic

 noun
     
Related topics: Elements
ar‧se‧nic [uncountable]
a very poisonous chemical substance that is sometimes used to kill rats, insects, and weeds. It is a chemical element: symbol As
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.
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