Webster's Dictionary, 1913

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Apellous adjective [ Prefix a- not + Latin pellis skin.] Destitute of skin. Brande & C.

Apennine adjective [ Latin Apenninus , from Celtic pen , or ben , peak, mountain.] Of, pertaining to, or designating, the Apennines, a chain of mountains extending through Italy.

Apepsy noun [ New Latin apepsia , from Greek ..., from ... uncooked, undigested; 'a priv. + ... cooked, ... to cook, digest.] (Medicine) Defective digestion, indigestion. Coxe.

Aper noun One who apes.

Aperçu (ȧ`pâr`su") noun ; plural Aperçus (- su"). [ French, propast participle p. of apercevoir to perceive.]
1. A first view or glance, or the perception or estimation so obtained; an immediate apprehension or insight, appreciative rather than analytic.

The main object being to develop the several aperçus or insights which furnish the method of such psychology.
W. T. Harris.

A series of partial and more or less disparate aperçus or outlooks; each for itself a center of experience.
James Ward.

2. Hence, a brief or detached view; conspectus; sketch.

Aperea noun [ Native name.] (Zoology) The wild Guinea pig of Brazil ( Cavia aperea ).

Aperient adjective [ Latin aperiens , present participle of aperire to uncover, open; ab + parire , parere , to bring forth, produce. Confer Cover , Overt .] (Medicine) Gently opening the bowels; laxative. -- noun An aperient medicine or food. Arbuthnot.

Aperitive adjective [ Confer French apéritif , from Latin aperire .] Serving to open; aperient. Harvey.

Apert adjective [ Old French apert , Latin apertus , past participle of aperire . See Aperient , and confer Pert , adjective ] Open; evident; undisguised. [ Archaic] Fotherby.

Apert adverb Openly. [ Obsolete] Chaucer.

Apertion noun [ Latin apertio .] The act of opening; an opening; an aperture. [ Archaic] Wiseman.

Apertly adverb Openly; clearly. [ Archaic]

Apertness noun Openness; frankness. [ Archaic]

Aperture noun [ Latin apertura , from aperire . See Aperient .]
1. The act of opening. [ Obsolete]

2. An opening; an open space; a gap, cleft, or chasm; a passage perforated; a hole; as, an aperture in a wall.

An aperture between the mountains.
Gilpin.

The back aperture of the nostrils.
Owen.

3. (Opt.) The diameter of the exposed part of the object glass of a telescope or other optical instrument; as, a telescope of four-inch aperture .

» The aperture of microscopes is often expressed in degrees, called also the angular aperture , which signifies the angular breadth of the pencil of light which the instrument transmits from the object or point viewed; as, a microscope of 100° aperture .

Apery noun ; plural Aperies .
1. A place where apes are kept. [ R.] Kingsley.

2. The practice of aping; an apish action. Coleridge.

Apetalous (ȧ*pĕt" a l*ŭs) adjective [ Prefix a- not + petal .] (Botany) Having no petals, or flower leaves. [ See Illust. under Anther ].

Apetalousness noun The state of being apetalous.

Apex noun ; plural English Apexes ; Latin Apices [ Latin ]
1. The tip, top, point, or angular summit of anything; as, the apex of a mountain, spire, or cone; the apex , or tip, of a leaf.

2. (Mining) The end or edge of a vein nearest the surface. [ U.S.]

Apex of the earth's motion (Astron.) , that point of the heavens toward which the earth is moving in its orbit.

Aphakia noun [ New Latin ; Greek 'a priv. + ... seed of a lentil.] (Medicine) An anomalous state of refraction caused by the absence of the crystalline lens, as after operations for cataract. The remedy is the use of powerful convex lenses. Dunglison.

Aphakial adjective (Medicine) Pertaining to aphakia; as, aphakial eyes.

Aphaniptera noun plural [ New Latin , from Greek ... invisible ( 'a priv. + ... to appear) + ... a wing.] (Zoology) A group of wingless insects, of which the flea in the type. See Flea .

Aphanipterous adjective (Zoology) Of or pertaining to the Aphaniptera.

Aphanite noun [ Greek ... invisible; 'a priv. + ... to appear.] (Min.) A very compact, dark-colored ...ock, consisting of hornblende, or pyroxene, and feldspar, but neither of them in perceptible grains.

Aphanitic adjective (Min.) Resembling aphanite; having a very fine-grained structure.

Aphasia, Aphasy noun [ New Latin aphasia , Greek ..., from ... not spoken; 'a priv. + ... to speak: confer French aphasie .] (Medicine) Loss of the power of speech, or of the appropriate use of words, the vocal organs remaining intact, and the intelligence being preserved. It is dependent on injury or disease of the brain.

Aphasic adjective Pertaining to, or affected by, aphasia; speechless.

Aphelion noun ; plural Aphelia [ Greek ... + ... sun.] (Astron.) That point of a planet's or comet's orbit which is most distant from the sun, the opposite point being the perihelion .

Apheliotropic adjective [ Greek ... + ... sun + ... belonging to a turning.] Turning away from the sun; -- said of leaves, etc. Darwin.

Apheliotropism noun The habit of bending from the sunlight; -- said of certain plants.

Aphemia noun [ New Latin , from Greek 'a priv. + ... voice.] (Medicine) Loss of the power of speaking, while retaining the power of writing; -- a disorder of cerebral origin.

Apheresis noun [ Latin aphaeresis , Greek ..., from ... to take away; ... + ... to take.]
1. (Gram.) The dropping of a letter or syllable from the beginning of a word; e. g ., cute for a cute.

2. (Surg.) An operation by which any part is separated from the rest. [ Obsolete] Dunglison.

Aphesis noun [ Greek ... a letting go; ... + ... to let go.] The loss of a short unaccented vowel at the beginning of a word; -- the result of a phonetic process; as, squire for esquire . New Eng. Dict.

Aphetic adjective [ Greek ... letting go, from ... to let go.] Shortened by dropping a letter or a syllable from the beginning of a word; as, an aphetic word or form. -- A*phet"ic*al*ly , adverb New Eng. Dict.

Aphetism noun An aphetized form of a word. New Eng. Dict.

Aphetize transitive verb To shorten by aphesis.

These words . . . have been aphetized .
New Eng. Dict.

Aphid noun (Zoology) One of the genus Aphis; an aphidian.

Aphides noun plural (Zoology) See Aphis .

Aphidian adjective (Zoology) Of or pertaining to the family Aphidæ . -- noun One of the aphides; an aphid.

Aphidivorous [ Aphis + Latin vorare to devour.] (Zoology) Devouring aphides; aphidophagous.

Aphidophagous adjective [ Aphis + Greek ... to eat.] (Zoology) Feeding upon aphides, or plant lice, as do beetles of the family Coccinellidæ .

Aphilanthropy noun [ Greek ... not loving man; 'a priv. + ... to love + ... man.] Want of love to mankind; -- the opposite of philanthropy . Coxe.

Aphis noun ; plural Aphides [ New Latin ] (Zoology) A genus of insects belonging to the order Hemiptera and family Aphidæ , including numerous species known as plant lice and green flies.

» Besides the true males and females, there is a race of wingless asexual individuals which have the power of producing living young in rapid succession, and these in turn may produce others of the same kind for several generations, before sexual individuals appear. They suck the sap of plants by means of a tubular proboscis, and owing to the wonderful rapidity of their reproduction become very destructive to vegetation. Many of the Aphidæ excrete honeydew from two tubes near the end of the body.

Aphis lion (Zoology) The larva of the lacewinged flies ( Chrysopa ), which feeds voraciously upon aphids. The name is also applied to the larvæ of the ladybugs ( Coccinella ).

Aphlogistic adjective [ Greek ... not inflammable; 'a priv. + ... set on fire. See Phlogiston .] Flameless; as, an aphlogistic lamp, in which a coil of wire is kept in a state of continued ignition by alcohol, without flame.

Aphonia, Aphony noun [ New Latin aphonia , Greek ..., from ... voiceless; 'a priv. + ... voice: confer French aphonie .] (Medicine) Loss of voice or vocal utterance.

Aphonic, Aphonous adjective Without voice; voiceless; nonvocal.

Aphorism noun [ French aphorisme , from Greek ... definition, a short, pithy sentence, from ... to mark off by boundaries, to define; ... from + ... to separate, part. See Horizon .] A comprehensive maxim or principle expressed in a few words; a sharply defined sentence relating to abstract truth rather than to practical matters.

The first aphorism of Hippocrates is, "Life is short, and the art is long."
Fleming.

Syn. -- Axiom; maxim; adage; proverb; apothegm; saying; saw; truism; dictum. See Axiom .

Aphorismatic, Aphorismic adjective Pertaining to aphorisms, or having the form of an aphorism.

Aphorismer noun A dealer in aphorisms. [ Used in derogation or contempt.] Milton.

Aphæresis noun [ Latin ] Same as Apheresis .