单词 | arsenic |
释义 | arsenicnoun /ˈɑːs(ə)nɪk ![]() The chemical element of atomic number 33, a brittle steel-grey semimetal. (Symbol: As) In animals and plants, arsenic combines with carbon and hydrogen to form organic arsenic....
Arsenic compounds (and their poisonous properties) have been known since ancient times, and the metallic form was isolated in the Middle Ages. Arsenic occurs naturally in orpiment, realgar, and other minerals, and rarely as the free element. Arsenic is used in semiconductors and some specialized alloys; its toxic compounds are widely used as herbicides and pesticides. adjective /ɑːˈsɛnɪk ![]() 1Relating to arsenic.Your article on arsenic poisoning of drinking water in Bangladesh and India (International, August 8) clearly illustrated a terrible disaster for many millions of people....
1.1 Chemistry Of arsenic with a valency of five; of arsenic(V). Compare with arsenious.Further dilutions only serve to reduce our chance of finding an arsenic ion by an order of magnitude each time....
OriginLate Middle English (denoting yellow orpiment, arsenic sulphide): via Old French from Latin arsenicum, from Greek arsenikon 'yellow orpiment', identified with arsenikos 'male', but in fact from Arabic al-zarnīḵ 'the orpiment', based on Persian zar 'gold'.
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