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The near approach of one heavenly body to another, or to the meridian; a coming into conjunction; as, the appulse of the moon to a star, or of a star to the meridian.

Fit or fitted; suited; suitable; appropriate. They have always apt instruments. Burke. A river . . . apt to be forded by a lamb. Jer. Taylor.

Without lateral columns; -- applied to buildings which have no series of columns along their sides, but are either prostyle or amphiprostyle, and opposed to peripteral. R. Cyc.

tendency to a particular action or effect; as, oil has an aptitude to burn. He seems to have had a peculiar aptitude for the management of irregular troops. Macaulay.

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.

of rough carnelian. Arangoes were formerly imported from Bombay for use in the African slave trade. McCulloch.

sion; arbitration. The arbitrament of time. Everett. Gladly at this moment would MacIvor have put their quarrel to personal arbitrament. Sir W. Scott.

A person, or one of two or more persons, chosen by parties who have a controversy, to determine their differences. See Arbitration.

An arched or covered passageway or avenue.

on which a natural group of animals or plants or their systems of organs are assumed to have been constructed; as, the vertebrate archetype.

n drill, propeller, etc. Archimedean screw, or Archimedes' screw, an instrument, said to have been invented by Archimedes, for raising water, formed by winding a flexible tube round a cylinder in the form of a screw. When the screw is placed in an inclined position, and the lower end immersed in water, by causing the s…

chitectural member surrounding the curved opening of an arch, corresponding to the architrave in the case of a square opening.

eorbo, or double-necked lute, formerly in use, having the bass strings doubled with an octave, and the higher strings with a unison.

area; as, areal interstices (the areas or spaces inclosed by the reticulate vessels of leaves).

"Sand" or "gravel" in the kidneys.

Divided into small spaces or areolations, as the wings of insects, the leaves of plants, or the receptacle of compound flowers.

as the spaces bounded by the nervures of the wings of insects, or those by the veins of leaves; an areola.

ow a proposition, opinion, or measure; to use arguments; to reason. I argue not Against Heaven's hand or will. Milton.

A fabulous being of antiquity, said to have had a hundred eyes, who has placed by Juno to guard Io. His eyes were transplanted to the peacock's tail.

come operative, sensible, or visible; to begin to act a part; to present itself; as, the waves of the sea arose; a persecution arose; the wrath of the king shall arise. There arose up a new king . . . which knew not Joseph. Ex. i. 8. The doubts that in his heart arose. Milton.