ETYM Latin arsenicum, Greek arsenikon, arrenikon, yellow orpiment, perh. from arsenikos or better Attic arrenikos masculine, arrhn male, on account of its strength, or from Per. zernîkh: cf. French arsenic.
Brittle, grayish-white, semimetallic element (a metalloid), symbol As, atomic number 33, atomic weight 74.92. It occurs in many ores and occasionally in its elemental state, and is widely distributed, being present in minute quantities in the soil, the sea, and the human body. In larger quantities, it is poisonous. The chief source of arsenic compounds is as a by-product from metallurgical processes. It is used in making semiconductors, alloys, and solders.
As it is a cumulative poison, its presence in food and drugs is very dangerous. The symptoms of arsenic poisoning are vomiting, diarrhea, tingling and possibly numbness in the limbs, and collapse. It featured in some drugs, including salvarsan, the first specific treatment for syphilis. Its name derives from the Latin arsenicum.
1. 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. As, atomic number 33.
2. A white powdered poisonous trioxide of arsenic; used in manufacturing glass and as a pesticide and weed killer; SYN. arsenic trioxide, arsenous anhydride, arsenous oxide.

Arsenic

ETYM Old Fren. armaire, armarie, French armoire, from Latin armarium place for keeping arms; but confused with French armoiries. Related to Armorial, Ambry.
(Alternate spelling: armoury).
1. A collection of resources; SYN. armoury, inventory.
2. A place where arms are manufactured; SYN. armoury, arsenal.
3. Heraldry.

Alternate (chiefly British) spelling for armory.

ETYM Spanish and French arsenal arsenal, dockyard, or Italian arzanale, arsenale; all from Arabic dâr-as-inâa house of industry or fabrication; dâr house + inâ art, industry.r /> 1. A military structure where arms and ammunition and other military equipment are stored and training is given in the use of arms; SYN. armory, armoury.
2. All the weapons and equipment that a country has; SYN. armory, armoury.
Store or factory for weapons; repertory.

1. A unit of length equal to 3 feet; defined as 91.44 centimeters; originally taken to be the average length of a stride; SYN. pace.
2. A tract of land enclosed for particular activities (sometimes paved and usually associated with buildings)
3. An area having a network of railway tracks and sidings for storage and maintenance of cars and engines; SYN. railway yard.
4. The land around a house or other building; SYN. grounds.
5. An enclosure for animals (as chicken or livestock).
6. (Sailing) A long horizontal spar tapered at the end and used to support and spread a square sail or lateen.

A salt or ester of arsenic acid.

Of, relating to, or containing arsenic especially with a valence of five

ETYM Cf. French arsénieux.
Relating to compounds in which arsenic is trivalent.

ETYM Cf. French arsénieux.
Relating to compounds in which arsenic is trivalent.

An acid formed from arsenic pentoxide.

A binary compound of arsenic with a more electropositive element.

ETYM Latin arsenicum, Greek arsenikon, arrenikon, yellow orpiment, perh. from arsenikos or better Attic arrenikos masculine, arrhn male, on account of its strength, or from Per. zernîkh: cf. French arsenic.
Brittle, grayish-white, semimetallic element (a metalloid), symbol As, atomic number 33, atomic weight 74.92. It occurs in many ores and occasionally in its elemental state, and is widely distributed, being present in minute quantities in the soil, the sea, and the human body. In larger quantities, it is poisonous. The chief source of arsenic compounds is as a by-product from metallurgical processes. It is used in making semiconductors, alloys, and solders.
As it is a cumulative poison, its presence in food and drugs is very dangerous. The symptoms of arsenic poisoning are vomiting, diarrhea, tingling and possibly numbness in the limbs, and collapse. It featured in some drugs, including salvarsan, the first specific treatment for syphilis. Its name derives from the Latin arsenicum.
1. 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. As, atomic number 33.
2. A white powdered poisonous trioxide of arsenic; used in manufacturing glass and as a pesticide and weed killer; SYN. arsenic trioxide, arsenous anhydride, arsenous oxide.

A poisonous trioxide As2O3 or As4O6 of arsenic used especially as an insecticide or weed killer.

Arsenic

A silver-white or gray ore of arsenic; SYN. mispickel.

Of, relating to, or containing arsenic especially with a valence of five