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arsenic

ar·se·nic

arsenic

pronunciation:
ar s nihk
features:
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part of speech: noun
definition 1: a poisonous chemical element that has thirty-three protons in each nucleus and occurs in brittle, grayish white crystalline masses or in yellow or black allotropes. (symbol: As)
definition 2: a tasteless, odorless, extremely poisonous white compound of arsenic and oxygen, used as a pesticide; arsenous acid; arsenic trioxide.
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  element