Part 122

<hw>A"corn-shell`</hw> <tt>(#)</tt>, <tt>n.</tt> <fld>(Zo\'94l.)</fld> <def>One of the sessile cirripeds; a barnacle of the genus <spn>Balanus</spn>. See <er>Barnacle</er>.</def>

<h1>Acosmism</h1> <Xpage=16>

<hw>A*cos"mism</hw> <tt>(#)</tt>, <tt>n.</tt> <ety>[Gr. <?/ priv. + <?/ world.]</ety> <def>A denial of the existence of the universe as distinct from God.</def>

<h1>Acosmist</h1> <Xpage=16>

<hw>A*cos"mist</hw> <tt>(#)</tt>, <tt>n.</tt> <ety>[See <er>Acosmism</er>.]</ety> <def>One who denies the existence of the universe, or of a universe as distinct from God.</def>

<i>G. H. Lewes.</i>

<h1>Acotyledon</h1> <Xpage=16>

<hw>A*cot`y*le"don</hw> <tt>(#; 277)</tt>, <tt>n.</tt> <ety>[Gr. <?/ priv. + <?/ anything cup-shaped. See <er>Cotyledon</er>.]</ety> <fld>(Bot.)</fld> <def>A plant which has no cotyledons, as the dodder and all flowerless plants.</def>

<h1>Acotyledonous</h1> <Xpage=16>

<hw>A*cot`y*led"on*ous</hw> <tt>(#; 277)</tt>, <tt>a.</tt> <def>Having no seed lobes, as the dodder; also applied to plants which have no true seeds, as ferns, mosses, etc.</def>

<h1>Acouchy</h1> <Xpage=16>

<hw>A*cou"chy</hw> <tt>(#)</tt>, <tt>n.</tt> <ety>[F. <ets>acouchi</ets>, from the native name Guiana.]</ety> <fld>(Zo\'94l.)</fld> <def>A small species of agouti <spn>(Dasyprocta acouchy)</spn>.</def>

<h1>Acoumeter</h1> <Xpage=16>

<hw>A*cou"me*ter</hw> <tt>(#)</tt>, <tt>n.</tt> <ety>[Gr. <?/ to hear + <ets>-meter</ets>.]</ety> <fld>(Physics.)</fld> <def>An instrument for measuring the acuteness of the sense of hearing.</def>

<i>Itard.</i>

<h1>Acoumetry</h1> <Xpage=16>

<hw>A*cou"me*try</hw> <tt>(#)</tt>, <tt>n.</tt> <ety>[Gr. <?/ to hear + <ets>-metry</ets>.]</ety> <def>The measuring of the power or extent of hearing.</def>

<h1>Acoustic</h1> <Xpage=16>

<hw>A*cous"tic</hw> <tt>(#; 277)</tt>, <tt>a.</tt> <ety>[F. <ets>acoustique</ets>, Gr. <?/ relating to hearing, fr. <?/ to hear.]</ety> <def>Pertaining to the sense of hearing, the organs of hearing, or the science of sounds; auditory.</def>

<cs><col>Acoustic duct</col>, <cd>the auditory duct, or external passage of the ear.</cd> -- <col>Acoustic telegraph</col>, <cd>a telegraph making audible signals; a telephone.</cd> -- <col>Acoustic vessels</col>, <cd>brazen tubes or vessels, shaped like a bell, used in ancient theaters to propel the voices of the actors, so as to render them audible to a great distance.</cd></cs>

<h1>Acoustic</h1> <Xpage=16>

<hw>A*cous"tic</hw>, <tt>n.</tt> <def>A medicine or agent to assist hearing.</def>

<h1>Acoustical</h1> <Xpage=16>

<hw>A*cous"tic*al</hw> <tt>(#)</tt>, <tt>a.</tt> <def>Of or pertaining to acoustics.</def>

<h1>Acoustically</h1> <Xpage=16>

<hw>A*cous"tic*al*ly</hw> <tt>(#)</tt>, <tt>adv.</tt> <def>In relation to sound or to hearing.</def>

<i>Tyndall.</i>

<h1>Acoustician</h1> <Xpage=16>