- a grayish-white element having a metallic luster, vaporizing when heated, and forming poisonous compounds. Symbol: As; atomic weight: 74.92; atomic number: 33.
- arsenic trioxide.
- a mineral, the native element, occurring in white or gray masses.
- of or containing arsenic, especially in the pentavalent state.
Origin of arsenic
Examples from the Web for arsenic
Arsenic can also cause cardiovascular disease, which African-Americans have greater genetic susceptibility for, she said.The Congressman Fighting for More Arsenic in Drinking Water
July 7, 2014
Playing this season: Annie, Steel Magnolias, and Arsenic and Old Lace.16 Surprising Things Now More Expensive Than a Night on a Carnival Cruise
April 12, 2013
Arsenic has been used as a poisoning agent since the Middle Ages.No Answers in Death of Technician Linked to Andrew Breitbart
November 30, 2012
Arsenic, copper, lead and PCBs were found in the soil, sediment and water.Our Most Polluted States
The Daily Beast
May 19, 2010
Arsenic is needed for the preservation of all specimens against moths.Taxidermy
Leon Luther Pray
Arsenic is a steel-gray, metallic-looking substance of density 5.73.An Elementary Study of Chemistry
Arsenic compounds are also used in "cattle-dips" for killing vermin.The Economic Aspect of Geology
C. K. Leith
Arsenic in the form of Fowler's solution is often beneficial.Special Report on Diseases of the Horse
United States Department of Agriculture
Arsenic inflames the mucous membranes of the alimentary passages.Alcohol and the Human Brain
- a toxic metalloid element, existing in several allotropic forms, that occurs principally in realgar and orpiment and as the free element. It is used in transistors, lead-based alloys, and high-temperature brasses. Symbol: As; atomic no: 33; atomic wt: 74.92159; valency: –3, 0, +3, or +5; relative density: 5.73 (grey); melting pt: 817°C at a pressure of 3MN/m² (grey); sublimes at 613°C (grey)
- a nontechnical name for arsenic trioxide
- of or containing arsenic, esp in the pentavalent state
Word Origin and History for arsenic
late 14c., from Old French arsenic, from Latin arsenicum, from late Greek arsenikon "arsenic" (Dioscorides; Aristotle has it as sandarake), adapted from Syriac (al) zarniqa "arsenic," from Middle Persian zarnik "gold-colored" (arsenic trisulphide has a lemon-yellow color), from Old Iranian *zarna- "golden," from PIE root *ghel- "to shine" (see Chloe).
The form of the Greek word is folk etymology, literally "masculine," from arsen "male, strong, virile" (cf. arseno-koites "lying with men" in New Testament) supposedly in reference to the powerful properties of the substance. The mineral (as opposed to the element) is properly orpiment, from Latin auri pigmentum, so called because it was used to make golden dyes.
- A poisonous metallic element, compounds of which are used as antamebics. Atomic number 33.
- Of or containing arsenic, especially with valence 5.
- A metalloid element most commonly occurring as a gray crystal, but also found as a yellow crystal and in other forms. Arsenic and its compounds are highly poisonous and are used to make insecticides, weed killers, and various alloys. Atomic number 33; atomic weight 74.922; valence 3, 5. Gray arsenic melts at 817°C (at 28 atm pressure), sublimes at 613°C, and has a specific gravity of 5.73. See Periodic Table.