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Approximation

The act of approximating; a drawing, advancing or being near; approach; also, the result of approximating.

Appui

A support or supporter; a stay; a prop.

Appulse

A driving or running towards; approach; impulse; also, the act of striking against.

Appulsion

A driving or striking against; an appulse.

Appulsive

Striking against; impinging; as, the appulsive influence of the planets.

Appurtenance

That which belongs to something else; an adjunct; an appendage; an accessory; something annexed to another thing more worthy; in common parlance and legal acceptation, something belonging to another thing as principal, and which passes as incident to it, as a right of way, or other easement to land; a right of common to pasture, an outhouse, barn, garden, or orchard, to a house or messuage. In a strict legal sense, land can never pass as an appurtenance to land.

appurtenances

miscellaneous articles needed for a particular operation or sport etc.

Appurtenant

Something which belongs or appertains to another thing; an appurtenance.

apractic

having uncoordinated muscular movements, symptomatic of a CNS disorder; suffering from apraxia.

apraxia

inability to make purposeful movements, but without paralysis or loss of sensory function.

apraxic

having uncoordinated muscular movements, symptomatic of a CNS disorder.

Apricot

A fruit allied to the plum, of an orange color, oval shape, and delicious taste; also, the tree (Prunus Armeniaca of Linn/us) which bears this fruit. By cultivation it has been introduced throughout the temperate zone.

April

The fourth month of the year.

Apriority

The quality of being innate in the mind, or prior to experience; a priori reasoning.

Aprocta

A group of Turbellaria in which there is no anal aperture.

Apron

An article of dress, of cloth, leather, or other stuff, worn on the fore part of the body, to keep the clothes clean, to defend them from injury, or as a covering. It is commonly tied at the waist by strings.

Apropos

Opportunely or opportune; seasonably or seasonable.

Apse

A projecting part of a building, esp. of a church, having in the plan a polygonal or semicircular termination, and, most often, projecting from the east end. In early churches the Eastern apse was occupied by seats for the bishop and clergy. The bishop's seat or throne, in ancient churches.

Apsidal

Of or pertaining to the apsides of an orbit.

Apsis

One of the two points of an 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 apsides.

Apsu

father of the gods and consort of Tiamat.

Apt

To fit; to suit; to adapt.

Aptera

Insects without wings, constituting the seventh Linn/n 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.

Apteria

Naked spaces between the feathered areas of birds. See Pteryli/.

Apterous

Destitute of wings; apteral; as, apterous insects.

Apteryges

An order of birds, including the genus Apteryx.

Apterygiformes

a ratite bird order: flightless ground birds having vestigial wings and long bills and small eyes: kiwis.

Apteryx

A genus of New Zealand birds about the size of a hen, with only short rudiments of wings, armed with a claw and without a tail; the kiwi. It is allied to the gigantic extinct moas of the same country. Five species are known.

Aptitude

A natural or acquired disposition or capacity for a particular purpose, or tendency to a particular action or effect; as, oil has an aptitude to burn.

Aptly

In an apt or suitable manner; fitly; properly; pertinently; appropriately; readily.

Aptness

Fitness; suitableness; appropriateness; as, the aptness of things to their end.

Aptote

A noun which has no distinction of cases; an indeclinable noun.

Aptotic

Pertaining to, or characterized by, aptotes; uninflected; as, aptotic languages.

Aptychus

A shelly plate found in the terminal chambers of ammonite shells. Some authors consider them to be jaws; others, opercula.

Apus

A genus of fresh-water phyllopod crustaceans. See Phyllopod.

Apyretic

Without fever; -- applied to days when there is an intermission of fever.

Apyrous

Incombustible; capable of sustaining a strong heat without alteration of form or properties.

Aqua

Water; -- a word much used in pharmacy and the old chemistry, in various signification, determined by the word or words annexed.

aquaculture

the cultivation of aquatic animals, such as fish or shellfish, or of plants, such as seaweed, in a controlled and sometimes enclosed body of water. The term includes use of either salt or fresh water. It is a form of agriculture, but under water.

aqualung

an apparatus containing compressed air or other oxygen-gas mixture, permitting a person to breathe under water; -- also called a scuba.

Aquamarine

A transparent, pale green variety of beryl, used as a gem. See Beryl.

Aquapuncture

The introduction of water subcutaneously for the relief of pain.

Aquarelle

A design or painting in thin transparent water colors; also, the mode of painting in such colors.

Aquarian

One of a sect of Christian in the primitive church who used water instead of wine in the Lord's Supper.

Aquarium

An artificial pond, or a globe or tank (usually with glass sides), in which living specimens of aquatic animals or plants are kept.

Aquarius

The Water-bearer; the eleventh sign in the zodiac, which the sun enters about the 20th of January; -- so called from the rains which prevail at that season in Italy and the East. A constellation south of Pegasus.

Aquatinta Aquatint

A kind of etching in which spaces are bitten by the use of aqua fortis, by which an effect is produced resembling a drawing in water colors or India ink; also, the engraving produced by this method.

aquavit

a Scandinavian liquor usually flavored with caroway seeds; -- also called akvavit.

Aqueduct

A conductor, conduit, or artificial channel for conveying water, especially one for supplying large cities with water.

Aqueous

Partaking of the nature of water, or abounding with it; watery.

aquifer

an underground bed or layer yielding ground water for wells and springs etc.; as, the Oglala aquifer. The water contained in an aquifer may be of great age, and in such cases is sometimes called fossil water.

Aquiferous

Consisting or conveying water or a watery fluid; as, aquiferous vessels; the aquiferous system.

aquilege

a plant of the genus Aquilegia having irregular showy spurred flowers; N temperate regions esp. mountains.

aquilegia

a plant of the genus Aquilegia having irregular showy spurred flowers; N temperate regions esp. mountains.

Aquiparous

Secreting water; -- applied to certain glands.

Aquitanian

Of or pertaining to Aquitania, now called Gascony.

Aquosity

The condition of being wet or watery; wateriness.

Ar

Ere; before.

Ara

A name of the great blue and yellow macaw (Ara ararauna), native of South America.

Arab

One of a swarthy race occupying Arabia, and numerous in Syria, Northern Africa, etc.

Araba

A wagon or cart, usually heavy and without springs, and often covered.

Arabian

A native of Arabia; an Arab.

Arabic

The language of the Arabians.

Arabin

A carbohydrate, isomeric with cane sugar, contained in gum arabic, from which it is extracted as a white, amorphous substance.

Arabinose

A sugar of the composition C5H10O5, obtained from cherry gum by boiling it with dilute sulphuric acid.

Arabism

An Arabic idiom peculiarly of language.

Arabist

One well versed in the Arabic language or literature; also, formerly, one who followed the Arabic system of surgery.

Araby

The country of Arabia.

Aracanese

Of or pertaining to Aracan, a province of British Burmah. A native or natives of Aracan.

Aracari

A South American bird, of the genus Pleroglossius, allied to the toucans. There are several species.

Arace

To tear up by the roots; to draw away.

Araceous

Of or pertaining to an order of plants, of which the genus Arum is the type.

Arachnida

One of the classes of Arthropoda. See Illustration in Appendix.

Arachnidial

Of or pertaining to the Arachnida. Pertaining to the arachnidium.

Arachnidium

The glandular organ in which the material for the web of spiders is secreted.

Arachnoidal

Pertaining to the arachnoid membrane; arachnoid.

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