Dictionary: AR-RO'BA – AR-SEN'IC-AL

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AR-RO'BA, n. [Arabic.]

A weight in Portugal of thirty-two pounds; in Spain, of twenty-five pounds. Also a Spanish measure of thirty-two Spanish pints. – Sp. Dict.

AR'RO-GANCE, n. [L. arrogantia, from arrogo, to claim; of ad and rogo, to beg, or desire; Fr. arrogance; Arm. roguentez; Sp. and Port. arrogancia; It. arroganza. See Arrogate.]

The act or quality of taking much upon one's self; that species of pride which consists in exorbitant claims of rank, dignity, estimation, or power, or which exalts the worth or importance of the person to an undue degree; proud contempt of others; conceitedness; presumption. I will cause the arrogance of the proud to cease. – Is. xiii. 1 Sam. ii. Prov. viii.


Arrogance. [This orthography is less usual.]


  1. Assuming; making, or having the disposition to make exorbitant claims of rank or estimation; giving one's self an undue degree of importance; haughty; conceited; applied to persons.
  2. Containing arrogance; marked with arrogance; proceeding from undue claims or self importance; applied to things; as, arrogant pretensions, or behavior.


In an arrogant manner; with undue pride, or self importance.


Arrogance. [Little used.]

AR'RO-GATE, v.t. [L. arrogo, of ad and rogo; Fr. arroger; Sp. and Port. arrogar; It. arrogare. The primary sense of rogo, to ask, is to reach or stretch.]

To assume, demand, or challenge more than is proper; to make undue claims from vanity, or false pretensions to right or merit; as, the Pope arrogated dominion over kings.


Claimed by undue pretensions.


Challenging or claiming more power or respect than is just or reasonable.


The act of arrogating, or making exorbitant claims; the act of taking more than one is justly entitled to.


Assuming, or making undue claims and pretensions. – More.

AR-ROND'IS-MENT, n. [from Fr. arrondir, to make round; of ad and rond, round.]

A circuit; a district; a division, or portion of territory, in France, for the exercise of a particular jurisdiction.

AR-RO'SION, n. [s as z. L. arrodo.]

A gnawing.

AR'ROW, n. [Sax. arewa. Qu. ray, radius, a shoot.]

  1. A missive weapon of offense, straight, slender, pointed, and barbed, to be shot with a bow.
  2. In Scripture, the arrows of God, are the apprehensions of his wrath, which pierce and pain the conscience. – Job vi. Ps. xxxviii. In a like figurative manner, arrows represent the judgments of God, as thunder, lightning, tempests, and famine. – 2 Sam. xxii. Ezek. v. Hab. iii. The word is used also for slanderous words, and malicious purposes of evil men. – Ps. xi. Prov. xxv. Jer. ix. Ps. lxiv. – Cruden. Brown.


A plant, or genus of plants; the Triglochin. Muhlenberg.


  1. The head of an arrow.
  2. Sagittaria. a genus of aquatic plants, so called from the resemblance of the leaves to the point of an arrow.


  1. The Maranta; a genus of plants, natives of the Indies. The Indians are said to employ the roots of the Arundinacea, in extracting the virus of poisoned arrows; whence the name. There are several species. From the root of the Arundinacea, or starch-plant, is obtained the arrow-root of the shops. – Encyc.
  2. The starch of the Marant, or arrow-root, a nutritive medicinal food.


Shaped like an arrow.

AR'ROW-Y, a.

  1. Consisting of arrows. – Milton.
  2. Formed like an arrow. – Cowper.

ARSE, n. [àrs; Sax. earse; D. aars; G. arsch; Persic, arsit, or arst.]

The buttocks, or hind part of an animal. To hang an arse, is to lag behind; to be sluggish, or tardy.

AR-SE-NAL, n. [Sp. Port. It. Fr. Arm. a magazine or repository of stores; in Italian and Spanish, a dock or dockyard; probably L. arx navalis, a naval citadel or repository.]

A repository or magazine of arms and military stores, whether for land or naval service.


A salt, formed by arsenic acid combined with any base. – Lavoisier. Fourcroy.

AR'SEN-IC, n. [Ar. زِرْنَقٌ zirnakon; Syr. ܐܪܢܝܒܐ zarnika; Gr. αρσενικον; L. arsenicum; Sp. arsenico; Fr. arsenic.]

Arsenic, as it is usually seen in the shops, is not a metal, but an acid from which the metal may be easily obtained by mixing it with half its weight of black flux, and introducing the mixture into a Florence flask, gradually raised to a red heat, in a sand bath. A brilliant metallic sublimate of pure arsenic collects in the upper part of the flask. Arsenic is of a steel blue color, quite brittle. It forms alloys with most of the metals. Combined with sulphur it forms orpiment or realgar, which are the yellow and red sulphurets of arsenic. Orpiment is the true arsenicum of the ancients. Plin. 34, 18. Native orpiment appears in yellow, brilliant, and seemingly talcky masses of various sizes; realgar is red, of different shades, and often crystalized in needles. Arsenic is also found as a mineralizer in cobalt, antimony, copper, iron and silver ores. It is brought chiefly from the cobalt works in Saxony, where zaffer is made. – Fourcroy. Nicholson. Cyc.


Arsenic combined with a greater proportion of oxygen, than in the arsenous acid.


Belonging to arsenic; consisting of or containing arsenic.