atomic number 33

Từ điển WordNet v3.1 - WordNet Dictionary

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
• Syn:
arsenic, As
• Derivationally related forms:
arsenious (for: arsenic), arsenical (for: arsenic)
• Hypernyms:
chemical element, element
• Substance Holonyms:
herbicide, weedkiller, weed killer, insecticide, insect powder,
arsenopyrite, mispickel, orpiment, realgar