| NOUN | substance | atomic number 33, arsenic, As | a very poisonous metallic element that has three allotropic forms |
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| Meaning | 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 | arsenic, As | |
| Broader | 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 of | arsenopyrite, mispickel | A silver-white or grey ore of arsenic |
| herbicide, weedkiller, weed killer | A chemical agent that destroys plants or inhibits their growth | |
| insecticide, insect powder | A chemical used to kill insects | |
| orpiment | A yellow mineral occurring in conjunction with realgar | |
| realgar | A rare soft orange mineral consisting of arsenic sulphide | |
| Spanish | arsénico, número atómico 33 | |
| Catalan | arsènic, número atòmic 33 | |
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