Dictionary.net

Arsenious oxide or arsenious anhydride; - called also arsenious acid, white arsenic, and ratsbane.

Pertaining to, or derived from, arsenic; - said of those compounds of arsenic in which this element has its highest equivalence; as, arsenic acid.

Arsenious oxide or arsenious anhydride; - called also arsenious acid, white arsenic, and ratsbane.

Pertaining to, or derived from, arsenic; - said of those compounds of arsenic in which this element has its highest equivalence; as, arsenic acid.

A shiny gray element with atomic symbol As, atomic number 33, and atomic weight 75. It occurs throughout the universe, mostly in the form of metallic arsenides. Most forms are toxic. According to the Fourth Annual Report on Carcinogens (NTP 85-002, 1985), arsenic and certain arsenic compounds have been listed as known carcinogens. (From Merck Index, 11th ed)

A deadly mineral poison used in drugs, dyes, etc.

1. Arsenicum, arsenium, arsenum; a steel-gray metal, one of the elements, symbol As, atomic weight 75. 2. Arseni trioxidum, white arsenic.

Relating to the element arsenic, or one of its compounds; noting especially arsenic acid, H3AsO4 + 1/2 H2O, which forms arsenates with certain bases; not to be confused with what is ordinarily called arsenic, which is arsenous acid, arseni trioxidum.

See Arsenium.

A mineral poison: a soft, gray-colored metal.

A mineral poison, and its metallic base.

Arsenical.

A chemical element; also, a poisonous compound of this element.

A brittle elementary metal, of a steel-grey colour; a virulent poison, which is a white oxide of the metal.

A metal; a poisonous mineral substance, in the form of a white or steel-grey powder; also called arsenious acid.

A solid metal; of a steel-gray colour; granular texture; very brittle; volatilizing before melting; very combustible and acidifiable. It is not dangerous of itself, and only becomes so by virtue of the facility with which it absorbs oxygen.

A metal whose salts are poisonous and medicinal.

Popular name for arsenous acid.

An element frequently ranked among the metals, but now usually regarded as non-metallic. Both the amorphous and crystalline forms of a. are known. In the crystalline form it has a steel gray color and a specific gravity^ of 5.73. A. usually volatilizes directly, without fusion, giving off a lemon yellow vapor of garlicky odor, but under increased pressure it can be melted and then solidified into a crystalline mass. Its chemical symbol is As; its atomic weight is 75. The salts of a. are tonic and alterative. They are all poisonous.

Of, pertaining to or containing arsenic. List of poisons and their antidotes, see in appendix.

n. [Greek] A metal of a steel gray colour. Arsenious acid, a virulent poison, called also oxide of arsenic, white arsenic, and ratsbane.