| 1. |
(noun) a very poisonous metallic element that has three allotropic forms; arsenic and arsenic compounds are used as herbicides and insecticides and various alloys; found in arsenopyrite and orpiment and realgar |
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Synonyms: As, atomic number 33 |
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Related Words: chemical element, element |
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| 2. |
(noun) a white powdered poisonous trioxide of arsenic; used in manufacturing glass and as a pesticide and weed killer |
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Synonyms: arsenic trioxide, arsenous anhydride, arsenous oxide |
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Related Words: trioxide |
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