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arsenic

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noun ar·se·nic \ˈärs-nik, ˈär-sə-\

Definition of arsenic

  1. 1 :  a trivalent and pentavalent metalloid poisonous element that is commonly metallic steel gray, crystalline, and brittle and is used especially in wood preservatives, alloys, and semiconductors — see element table

  2. 2 :  a poisonous trioxide As2O3 or As4O6 of arsenic used especially as an insecticide or weed killer —called also arsenic trioxide

Origin and Etymology of arsenic

Middle English arsenik orpiment, from Anglo-French & Latin; Anglo-French, from Latin arsenicum, from Greek arsenikon, arrhenikon, from Syriac zarnīg, of Iranian origin; akin to Avestan zaranya gold, Sanskrit hari yellowish — more at yellow


First Known Use: 14th century


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arsenic

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adjective ar·sen·ic \är-ˈse-nik\

Definition of arsenic

  1. :  of, relating to, or containing arsenic especially with a valence of five

1798

First Known Use of arsenic

1798


ARSENIC Defined for English Language Learners

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arsenic

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noun ar·se·nic \ˈärs-nik, ˈär-sə-\

Definition of arsenic for English Language Learners

  • : a poisonous chemical that is used especially to kill insects and weeds


ARSENIC Defined for Kids

arsenic

play
noun ar·se·nic \ˈärs-nik, ˈär-sə-\

Definition of arsenic for Students

  1. :  a solid poisonous chemical element that is usually gray and snaps easily


Medical Dictionary

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arsenic

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noun ar·se·nic \ˈärs-nik, -ən-ik\

Medical Definition of arsenic

  1. 1:  a trivalent and pentavalent solid poisonous element that is commonly metallic steel-gray, crystalline, and brittle—symbol As; see element table

  2. 2:  arsenic trioxide


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arsenic

play
adjective ar·sen·ic \är-ˈsen-ik\

Medical Definition of arsenic

  1. :  of, relating to, or containing arsenic especially with a valence of five


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