arsenic

1. A white powdered poisonous trioxide of arsenic;
   Used in manufacturing glass and as a pesticide (rat poison) and weed killer (synset 114792380)
   is a type of: trioxide - an oxide containing three atoms of oxygen in the molecule
   same as: arsenic trioxide, arsenous anhydride, arsenous oxide, ratsbane, white arsenic
2. 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 (synset 114653327)
   is a type of: chemical element, element - any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter
   substance meronym:

   • arsenopyrite, mispickel - a silver-white or grey ore of arsenic
   • orpiment - a yellow mineral occurring in conjunction with realgar; an ore of arsenic
   • realgar - a rare soft orange mineral consisting of arsenic sulphide; an important ore of arsenic
   • herbicide, weed killer, weedkiller - a chemical agent that destroys plants or inhibits their growth
   • insect powder, insecticide - a chemical used to kill insects
   same as: as, atomic number 33

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