arsenic

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

  1. noun a white powdered poisonous trioxide of arsenic; used in manufacturing glass and as a pesticide (rat poison) and weed killer
  2. 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

Etymology

From Middle English arsenik, borrowed from Middle French arsenic, from Latin arsenicum, from Ancient Greek ἀρσενικόν (arsenikón, “yellow arsenic”) (influenced by ἀρσενικός (arsenikós, “potent, virile”)), from Semitic (compare Classical Syriac ܙܪܢܝܟܐ (zarnīḵā), Aramaic 𐡆𐡓𐡍𐡉𐡊𐡀 (zrnykʾ /⁠zarnīḵā⁠/)), from Middle Iranian *zarnīk (compare Persian زرنیخ (zirnīx /zernix, zarnīx /zarnix, “arsenic”), زرنی (zurnī /zorni), Bakhtiari زرنیق (zarniq)), from Old Median *zaraniyakā (compare Avestan 𐬰𐬀𐬭𐬀𐬥𐬌𐬌𐬀 (zaraniia, “golden”), Old Persian 𐎭𐎼𐎴𐎡𐎹 (d-r-n-i-y /⁠daraniya-⁠⁠⁠/, “gold”), Sanskrit हिरण्य (híraṇya, “gold”), Persian زر (zar, “gold”)), ultimately from Proto-Indo-European *ǵʰelh₃-. More at yellow.

In classic literature

Synonyms

arsenic trioxide, arsenous anhydride, arsenous oxide, white arsenic, ratsbane

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