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orbit, as of a planet or satellite, which are at the greatest and least distance from the central body, corresponding to the aphelion and perihelion of a planet, or to the apogee and perigee of the moon. The more distant is called the higher apsis; the other, the lower apsis; and the line joining them, the line of apsi…

seventh Linnæn order of insects, an artificial group, which included Crustacea, spiders, centipeds, and even worms. These animals are now placed in several distinct classes and orders.

ed for secret poisoning, made by an Italian woman named Tofana, in the middle of the 17th century, who is said to have poisoned more than 600 persons. Francis. -- Aqua vitæ Etym: [L., water of life. Cf. Eau de vie, Usquebaugh], a name given to brandy and some other ardent spirits. Shak.

A fabaceous tree of Brazil (Centrolobium robustum) having handsomely striped wood; --called also zebrawood.

ion of power. Arbitrary power is most easily established on the ruins of liberty abused licentiousness. Washington.

A precipitation of silver, in a beautiful arborescent form.

The state of being arborescent; the resemblance to a tree in minerals, or crystallizations, or groups of crystals in that form; as, the arborescence produced by precipitating silver.

Of or characterized by antiquity or archaism; antiquated; obsolescent.

An instrument for drawing a circular arc without the use of a central point; a cyclograph.

The area in the central part of an amphitheater, in which the gladiators fought and other shows were exhibited; -- so called because it was covered with sand.

, or O. argali), remarkable for its large horns. It inhabits the mountains of Siberia and central Asia.

men and animals. The famous Persian Argas, also called Miana bug, is A. Persicus; that of Central America, called talaje by the natives, is A. Talaje.

Pertaining to Arius, a presbyter of the church of Alexandria, in the fourth century, or to the doctrines of Arius, who held Christ to be inferior to God the Father in nature and dignity, though the first and noblest of all created beings. -- n.

A variety of the gazelle (Antilope, or Gazella, dorcas), found in Arabia and adjacent countries. (b) A squirrel-like Australian marsupial, a species of Petaurus. (c) A beautiful Brazilian toucan Ramphastos ariel).

A kind of helmet worn in the 14th, 15th, and 16th centuries.

Pertaining to, or containing, aroma; fragrant; spicy; strong- scented; odoriferous; as, aromatic balsam. Aromatic compound (Chem.), one of a large class of organic substances, as the oils of bitter almonds, wintergreen, and turpentine, the balsams, camphors, etc., many of which have an aromatic odor. They include many…

To impregnate with aroma; to render aromatic; to give a spicy scent or taste to; to perfume. Bacon.

To rest or fasten; to fix; to concentrate. [Obs.] We may arrest our thoughts upon the divine mercies. Jer. Taylor.

That elevation of voice now called metrical accentuation, or the rhythmic accent.

A genus of plants found in central Europe and about the Mediterranean, having flowers on a spadix inclosed in a spathe. The cuckoopint of the English is an example. Our common arums the lords and ladies of village children. Lubbock.