1. A white powdered poisonous trioxide of arsenic; used in manufacturing glass and as a pesticide (rat poison) and weed killer
   - arsenic, arsenic trioxide, arsenous anhydride, arsenous oxide, white arsenic

Derived forms: ratsbanes

Type of: trioxide

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• clipped
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• clippety-clop
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• Clitocybe
• Clitocybe clavipes
• Clitocybe dealbata
• Clitocybe inornata
• Clitocybe irina