| 单词 | arsenic |
| 释义 | arsenic (once / 2482 pages) n Arsenic is a chemical element that's quite poisonous to humans and other animals. Arsenic was once commonly used in rat poison and insecticides. While arsenic is a naturally occurring element, it's often thought of as a poison used in mystery novels to murder people. Several kinds of agricultural bug killers once contained arsenic, but historically people have been more likely to suffer arsenic poisoning from natural leaching into water sources, like wells, or as a side effect of mining. Arsenic has a Greek root, arsenikon, from the Middle Persian zarnik, "gold colored." WORD FAMILYarsenic: arsenical, arsenious+/arsenical: arsenically, arsenicals USAGE EXAMPLESThe state Division of Waste Management tested the soil in August and found dangerous levels of arsenic near homes, playgrounds and a pool. Washington Times(Dec 23, 2016) It contains arsenic, selenium, mercury and other pollutants. Washington Times(Dec 21, 2016) The wastewater carried arsenic, lead, metal and other heavy metals and polluted rivers in Colorado, New Mexico and Utah. Washington Times(Dec 09, 2016) 1n 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 Syn|Hyper As, atomic number 33 chemical element, element any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter 2n a white powdered poisonous trioxide of arsenic; used in manufacturing glass and as a pesticide (rat poison) and weed killer Syn|Hyper arsenic trioxide, arsenous anhydride, arsenous oxide, ratsbane, white arsenic trioxide an oxide containing three atoms of oxygen in the molecule |
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