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arsenic
noun
- a silvery-white, brittle, very poisonous chemical element, compounds of which are used in making insecticides, glass, medicines, semiconductors, etc.: symbol, As; at. no., 33
- loosely arsenic trioxide, AsO, a poisonous compound of arsenic used to exterminate insects and rodents: it is a white powder and has no taste
adjective
of or containing arsenic, esp. pentavalent arsenic
See arsenic in American Heritage Dictionary 4
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