Part 529

<hw>A*pert"ly</hw>, <tt>adv.</tt> <def>Openly; clearly.</def> <mark>[Archaic]</mark>

<h1>Apertness</h1> <Xpage=<hw>Anx*i"e*ty</hw> <tt>(#)</tt>, <tt>n.</tt>; <plu>pl. <plw>Anxieties</plw> <tt>(#)</tt></plu>. <ety>[L. <ets>anxietas</ets>, fr. <ets>anxius</ets>: cf. F. <ets>anxi\'82t\'82</ets>. See <er>Anxious</er>.]</ety>67 <p><b>1.</b> <def>Concern or solicitude respecting some thing o<?/<?/vent, future or uncertain, which disturbs the mind, and keeps it in a state of painful uneasiness.</def>>

<hw>A*pert"ness</hw>, <tt>n.</tt> <def>Openness; frankness.</def> <mark>[Archaic]</mark>

<h1>Aperture</h1> <Xpage=<hw>Anx*i"e*ty</hw> <tt>(#)</tt>, <tt>n.</tt>; <plu>pl. <plw>Anxieties</plw> <tt>(#)</tt></plu>. <ety>[L. <ets>anxietas</ets>, fr. <ets>anxius</ets>: cf. F. <ets>anxi\'82t\'82</ets>. See <er>Anxious</er>.]</ety>67 <p><b>1.</b> <def>Concern or solicitude respecting some thing o<?/<?/vent, future or uncertain, which disturbs the mind, and keeps it in a state of painful uneasiness.</def>>

<hw>Ap"er*ture</hw> <tt>(?; 135)</tt>, <tt>n.</tt> <ety>[L. <ets>apertura</ets>, fr. <ets>aperire</ets>. See <er>Aperient</er>.]</ety> <p><b>1.</b> <def>The act of opening.</def> <mark>[Obs.]</mark>

<p><b>2.</b> <def>An opening; an open space; a gap, cleft, or chasm; a passage perforated; a hole; <as>as, an <ex>aperture</ex> in a wall</as>.</def>

<blockquote>An <b>aperture</b> between the mountains. <i>Gilpin.</i></blockquote>

<blockquote>The back <b>aperture</b> of the nostrils. <i>Owen.</i></blockquote>

<p><b>3.</b> <fld>(Opt.)</fld> <def>The diameter of the exposed part of the object glass of a telescope or other optical instrument; <as>as, a telescope of four-inch <ex>aperture</ex></as>.</def>

<note>&hand; The <i>aperture</i> of microscopes is often expressed in degrees, called also the <i>angular aperture</i>, 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&deg; <i>aperture</i>.</note>

<h1>Apery</h1> <Xpage=<hw>Anx*i"e*ty</hw> <tt>(#)</tt>, <tt>n.</tt>; <plu>pl. <plw>Anxieties</plw> <tt>(#)</tt></plu>. <ety>[L. <ets>anxietas</ets>, fr. <ets>anxius</ets>: cf. F. <ets>anxi\'82t\'82</ets>. See <er>Anxious</er>.]</ety>67 <p><b>1.</b> <def>Concern or solicitude respecting some thing o<?/<?/vent, future or uncertain, which disturbs the mind, and keeps it in a state of painful uneasiness.</def>>

<hw>Ap"er*y</hw> <tt>(#)</tt>, <tt>n.</tt>; <plu>pl. <plw>Aperies</plw>. <p><b>1.</b> <def>A place where apes are kept.</def> <mark>[R.]</mark>

<i>Kingsley.</i>

<p><b>2.</b> <def>The practice of aping; an apish action.</def>

<i>Coleridge.</i>

<-- p. 68 -->

<h1>Apetalous</h1> <Xpage=68>

<hw>A*pet"al*ous</hw> <tt>(#)</tt>, <tt>a.</tt> <ety>[Pref. <ets>a-</ets> not + <ets>petal</ets>.]</ety> <fld>(Bot.)</fld> <def>Having no petals, or flower leaves. [See <i>Illust</i>. under <er>Anther</er>].</def>

<h1>Apetalousness</h1> <Xpage=68>

<hw>A*pet"al*ous*ness</hw>, <tt>n.</tt> <def>The state of being apetalous.</def>

<h1>Apex</h1> <Xpage=68>

<hw>A"pex</hw> <tt>(#)</tt>, <tt>n.</tt>; <plu>pl. E. <plw>Apexes</plw> <tt>(#)</tt>; L. <plw>Apices</plw> <tt>(#)</tt></plu>. <ety>[L.]</ety> <p><b>1.</b> <def>The tip, top, point, or angular summit of anything; <as>as, the <ex>apex</ex> of a mountain, spire, or cone; the <ex>apex</ex>, or tip, of a leaf.</as></def>

<p><b>2.</b> <fld>(Mining)</fld> <def>The end or edge of a vein nearest the surface.</def> <mark>[U.S.]</mark>

<cs><col>Apex of the earth's motion</col> <fld>(Astron.)</fld>, <cd>that point of the heavens toward which the earth is moving in its orbit.</cd></cs>

<h1>Aph\'91resis</h1> <Xpage=68>

<hw>A*ph\'91r"e*sis</hw> <tt>(?; 277)</tt>, <tt>n.</tt> <ety>[L.]</ety> <def>Same as <er>Apheresis</er>.</def>

<h1>Aphakia</h1> <Xpage=68>

<hw>A*pha"ki*a</hw> <tt>(#)</tt>, <tt>n.</tt> <ety>[NL.; Gr. <?/ priv. + <?/ seed of a lentil.]</ety> <fld>(Med.)</fld> <def>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.</def>