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Definitions for: Arsenic
[n] 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
[n] a white powdered poisonous trioxide of arsenic; used in manufacturing glass and as a pesticide and weed killer
Webster (1913) Definition: Ar"se*nic ([aum]r"s[-e]*n[i^]k; 277), n. [L.
arsenicum, Gr. 'arseniko`n, 'arreniko`n, yellow orpiment,
perh. fr. 'arseniko`s or better Attic 'arreniko`s masculine,
'a`rrhn male, on account of its strength, or fr. Per.
zern[=i]kh: cf. F. arsenic.]
1. (Chem.) One of the elements, a solid substance resembling
a metal in its physical properties, but in its chemical
relations ranking with the nonmetals. It is of a
steel-gray color and brilliant luster, though usually dull
from tarnish. It is very brittle, and sublimes at 356[deg]
Fahrenheit. It is sometimes found native, but usually
combined with silver, cobalt, nickel, iron, antimony, or
sulphur. Orpiment and realgar are two of its sulphur
compounds, the first of which is the true arsenicum of the
ancients. The element and its compounds are active
poisons. Specific gravity from 5.7 to 5.9. Atomic weight
75. Symbol As.
2. (Com.) Arsenious oxide or arsenious anhydride; -- called
also arsenious acid, white arsenic, and ratsbane.
Ar*sen"ic, a. (Chem.)
Pertaining to, or derived from, arsenic; -- said of those
compounds of arsenic in which this element has its highest
equivalence; as, arsenic acid.
Synonyms: arsenic trioxide, arsenous anhydride, arsenous oxide, As, atomic number 33
See Also: arsenopyrite, chemical element, element, herbicide, insect powder, insecticide, mispickel, orpiment, realgar, trioxide, weed killer, weedkiller
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