Part 115

<h1>Aciculate, Aciculated</h1> <Xpage=15>

<hw><hw>A*cic"u*late</hw> <tt>(#)</tt>, <hw>A*cic"u*la"ted</hw> <tt>(#)</tt><hw> <tt>a.</tt> <fld>(Nat. Hist.)</fld> <sd>(a)</sd> <def>Furnished with acicul\'91.</def> <sd>(b)</sd> <def>Acicular.</def> <sd>(c)</sd> <def>Marked with fine irregular streaks as if scratched by a needle.</def>

<i>Lindley.</i>

<h1>Aciculiform</h1> <Xpage=15>

<hw>A*cic"u*li*form</hw> <tt>(#)</tt>, <tt>a.</tt> <ety>[L. <ets>acicula</ets> needle + <ets>-form</ets>.]</ety> <def>Needle-shaped; acicular.</def>

<h1>Aciculite</h1> <Xpage=15>

<hw>A*cic"u*lite</hw> <tt>(#)</tt>, <tt>n.</tt> <fld>(Min.)</fld> <def>Needle ore.</def>

<i>Brande & C.</i>

<h1>Acid</h1> <Xpage=15>

<hw>Ac"id</hw> <tt>(#)</tt>, <tt>a.</tt> <ety>[L. <ets>acidus</ets> sour, fr. the root <ets>ak</ets> to be sharp: cf. F. <ets>acide</ets>. Cf. <er>Acute</er>.]</ety> <p><b>1.</b> <def>Sour, sharp, or biting to the taste; tart; having the taste of vinegar: as, <i>acid</i> fruits or liquors. Also fig.: Sour-tempered.</def>

<blockquote>He was stern and his face as <b>acid</b> as ever. <i>A. Trollope.</i></blockquote>

<p><b>2.</b> <def>Of or pertaining to an acid; <as>as, <ex>acid</ex> reaction</as>.</def>

<h1>Acid</h1> <Xpage=15>

<hw>Ac"id</hw>, <tt>n.</tt> <p><b>1.</b> <def>A sour substance.</def>

<p><b>2.</b> <fld>(Chem.)</fld> <def>One of a class of compounds, generally but not always distinguished by their sour taste, solubility in water, and reddening of vegetable blue or violet colors. They are also characterized by the power of destroying the distinctive properties of alkalies or bases, combining with them to form salts, at the same time losing their own peculiar properties. They all contain hydrogen, united with a more negative element or radical, either alone, or more generally with oxygen, and take their names from this negative element or radical. Those which contain no oxygen are sometimes called <i>hydracids</i> in distinction from the others which are called <i>oxygen acids</i> or <i>oxacids</i>.</def>

<note>&hand; In certain cases, sulphur, selenium, or tellurium may take the place of oxygen, and the corresponding compounds are called respectively <i>sulphur acids</i> or <i>sulphacids</i>, <i>selenium acids</i>, or <i>tellurium acids</i>. When the hydrogen of an acid is replaced by a positive element or radical, a salt is formed, and hence acids are sometimes named as salts of hydrogen; as <i>hydrogen nitrate</i> for nitric acid, <i>hydrogen sulphate</i> for sulphuric acid, etc. In the old chemistry the name <i>acid</i> was applied to the oxides of the negative or nonmetallic elements, now sometimes called <i>anhydrides</i>.</note>

<h1>Acidic</h1> <Xpage=15>

<hw>A*cid"ic</hw> <tt>(#)</tt>, <tt>a.</tt> <fld>(Min.)</fld> <def>Containing a high percentage of silica; -- opposed to <i>basic</i>.</def>

<-- 2. of or relating to acid; having the character of an acid, as <i>an acidic solution</i>. -->

<h1>Acidiferous</h1> <Xpage=15>

<hw>Ac`id*if"er*ous</hw> <tt>(#)</tt>, <tt>a.</tt> <ety>[L. <ets>acidus</ets> sour + <ets>-ferous</ets>.]</ety> <def>Containing or yielding an acid.</def>

<h1>Acidifiable</h1> <Xpage=15>

<hw>A*cid"i*fi`a*ble</hw> <tt>(#)</tt>, <tt>a.</tt> <def>Capable of being acidified, or converted into an acid.</def>

<h1>Acidific</h1> <Xpage=15>

<hw>Ac`id*if"ic</hw> <tt>(#)</tt>, <tt>a.</tt> <def>Producing acidity; converting into an acid.</def>

<i>Dana.</i>

<h1>Acidification</h1> <Xpage=15>

<hw>A*cid`i*fi*ca"tion</hw> <tt>(#)</tt>, <tt>n.</tt> <ety>[Cf. F. <ets>acidification</ets>.]</ety> <def>The act or process of acidifying, or changing into an acid.</def>