ratsbane

/ˈrætsˌbeɪn/
IPA guide

Definitions of ratsbane
  1. noun
    a white powdered poisonous trioxide of arsenic; used in manufacturing glass and as a pesticide (rat poison) and weed killer
    synonyms: arsenic, arsenic trioxide, arsenous anhydride, arsenous oxide, white arsenic
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    type of:
    trioxide
    an oxide containing three atoms of oxygen in the molecule
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