Part 2939

<hw>Den*sim"e*ter</hw> <tt>(?)</tt>, <tt>n.</tt> <ety>[L. <ets>densus</ets> dense + <ets>-meter</ets>: cf. F. <ets>densim\'8atre</ets>.]</ety> <def>An instrument for ascertaining the specific gravity or density of a substance.</def>

<h1>Density</h1> <Xpage=391>

<hw>Den"si*ty</hw> <tt>(?)</tt>, <tt>n.</tt> <ety>[L. <ets>densitas</ets>; cf. F. <ets>densit\'82</ets>.]</ety>

<p><b>1.</b> <def>The quality of being dense, close, or thick; compactness; -- opposed to <i>rarity</i>.</def>

<p><b>2.</b> <fld>(Physics)</fld> <def>The ratio of mass, or quantity of matter, to bulk or volume, esp. as compared with the mass and volume of a portion of some substance used as a standard.</def>

<note>&hand; For gases the standard substance is hydrogen, at a temperature of 0&deg; Centigrade and a pressure of 760 millimeters. For liquids and solids the standard is water at a temperature of 4&deg; Centigrade. The density of solids and liquids is usually called <i>specific gravity</i>, and the same is true of gases when referred to air as a standard.</note>

<p><b>3.</b> <fld>(Photog.)</fld> <def>Depth of shade.</def>

<i>Abney.</i>

<h1>Dent</h1> <Xpage=391>

<hw>Dent</hw> <tt>(?)</tt>, <tt>n.</tt> <ety>[A variant of <er>Dint</er>.]</ety>

<p><b>1.</b> <def>A stroke; a blow.</def> <mark>[Obs.]</mark> "That <i>dent</i> of thunder." <i>Chaucer.</i>

<p><b>2.</b> <def>A slight depression, or small notch or hollow, made by a blow or by pressure; an indentation.</def>

<blockquote>A blow that would have made a <b>dent</b> in a pound of butter. <i>De Quincey.</i></blockquote>

<h1>Dent</h1> <Xpage=391>

<hw>Dent</hw>, <tt>v. t.</tt> <wordforms>[<tt>imp. & p. p.</tt> <er>Dented</er>; <tt>p. pr. & vb. n.</tt> <er>Denting</er>.]</wordforms> <def>To make a dent upon; to indent.</def>

<blockquote>The houses <b>dented</b> with bullets. <i>Macaulay.</i></blockquote>

<h1>Dent</h1> <Xpage=391>

<hw>Dent</hw>, <tt>n.</tt> <ety>[F., fr. L. <ets>dens</ets>, <ets>dentis</ets>, tooth. See <er>Tooth</er>.]</ety> <fld>(Mach.)</fld> <def>A tooth, as of a card, a gear wheel, etc.</def>

<i>Knight.</i>

<h1>Dental</h1> <Xpage=391>

<hw>Den"tal</hw> <tt>(?)</tt>, <tt>a.</tt> <ety>[L. <ets>dens</ets>, <ets>dentis</ets>, tooth: cf. F. <ets>dental</ets>. See <er>Tooth</er>.]</ety>

<p><b>1.</b> <def>Of or pertaining to the teeth or to dentistry; <as>as, <ex>dental</ex> surgery</as>.</def>

<p><b>2.</b> <fld>(Phon.)</fld> <def>Formed by the aid of the teeth; -- said of certain articulations and the letters representing them; <as>as, <ex>d t</ex> are <ex>dental</ex> letters</as>.</def>

<cs><col>Dental formula</col> <fld>(Zo\'94l.)</fld>, <cd>a brief notation used by zo\'94logists to denote the number and kind of teeth of a mammal.</cd> -- <col>Dental surgeon</col>, <cd>a dentist.</cd></cs>

<h1>Dental</h1> <Xpage=391>

<hw>Den"tal</hw>, <tt>n.</tt> <ety>[Cf. F. <ets>dentale</ets>. See <er>Dental</er>, <tt>a.</tt>]</ety>

<p><b>1.</b> <def>An articulation or letter formed by the aid of the teeth.</def>

<p><b>2.</b> <fld>(Zo\'94l.)</fld> <def>A marine mollusk of the genus <spn>Dentalium</spn>, with a curved conical shell resembling a tooth. See <er>Dentalium</er>.</def>