Part 3952

<h1>Ethylidene</h1> <Xpage=513>

<hw>E*thyl"i*dene</hw> <tt>(?)</tt>. <fld>(Chem.)</fld> <def>An unsymmetrical, divalent, hydrocarbon radical, <chform>C2H4</chform> metameric with ethylene but written thus, <chform>CH3.CH</chform> to distinguish it from the symmetrical ethylene, <chform>CH2.CH2</chform>. Its compounds are derived from aldehyde. Formerly called also <altname>ethidene</altname>.</def>

<h1>Ethylin</h1> <Xpage=513>

<hw>Eth"yl*in</hw> <tt>(?)</tt>. <fld>(Chem.)</fld> <def>Any one of the several complex ethers of ethyl and glycerin.</def>

<h1>Ethylsulphuric</h1> <Xpage=513>

<hw>Eth`yl*sul*phu"ric</hw> <tt>(?)</tt> <tt>a.</tt> <fld>(Chem.)</fld> <def>Pertaining to, or containing, ethyl and sulphuric acid.</def>

<cs><col>Ethylsulphuric acid</col> <fld>(Chem.)</fld>, <cd>an acid sulphate of ethyl, <chform>H.C2H5.SO4</chform>, produced as a thick liquid by the action of sulphiric acid on alcohol. It appears to be the active catalytic agent in the process of etherification.</cd></cs>

<h1>Etiolate</h1> <Xpage=513>

<hw>E"ti*o*late</hw> <tt>(?)</tt>. <tt>v. i.</tt> <wordforms>[<tt>imp. & p. p.</tt> <er>Etiolated</er> <tt>(#)</tt>; <tt>p. pr. & vb. n</tt>. <er>Etiolating</er>.]</wordforms> <ety>[F. <ets>\'82tioler</ets> to blanch.]</ety> <p><b>1.</b> <def>To become white or whiter; to be whitened or blanched by excluding the light of the sun, as, plants.</def>

<p><b>2.</b> <fld>(Med.)</fld> <def>To become pale through disease or absence of light.</def>

<h1>Etiolate</h1> <Xpage=513>

<hw>E"ti*o*late</hw>, <tt>v. t.</tt> <p><b>1.</b> <def>To blanch; to bleach; to whiten by depriving of the sun's rays.</def>

<p><b>2.</b> <fld>(Med.)</fld> <def>To cause to grow pale by disease or absence of light.</def>

<h1>Etiolate, Etiolated</h1> <Xpage=513>

<hw><hw>E"ti*o*late</hw> <tt>(?)</tt>, <hw>E"ti*o*la`ted</hw>,<hw> <tt>a.</tt> <def>Having a blanched or faded appearance, as birds inhabiting desert regions.</def>

<h1>Etiolation</h1> <Xpage=513>

<hw>E`ti*o*la"tion</hw> <tt>(?)</tt>, <tt>n.</tt> <p><b>1.</b> <def>The operation of blanching plants, by excluding the light of the sun; the condition of a blanched plant.</def>

<p><b>2.</b> <fld>(Med.)</fld> <def>Paleness produced by absence of light, or by disease.</def>

<i>Dunglison.</i>

<h1>Etoolin</h1> <Xpage=513>

<hw>E"to*o*lin</hw> <tt>(?)</tt>, <tt>n.</tt> <ety>[See <er>Etiolate</er>.]</ety> <fld>(Bot.)</fld> <def>A yellowish coloring matter found in plants grown in darkness, which is supposed to be an antecedent condition of chlorophyll.</def>

<i>Encyc. Brit.</i>

<h1>Etiological</h1> <Xpage=513>

<hw>E`ti*o*log"ic*al</hw> <tt>(?)</tt>, <tt>a.</tt> <def>Pertaining to, or inquiring into, causes; \'91tiological.</def>

<h1>Etiology</h1> <Xpage=513>

<hw>E`ti*ol"o*gy</hw> <tt>(?)</tt>, <tt>n.</tt> <ety>[Cf. F. <ets>\'82tiologie</ets>.]</ety> <def>The science of causes. Same as <?/<er>tiology</er>.</def>

<h1>Etiquette</h1> <Xpage=513>

<hw>Et"i*quette`</hw> <tt>(?)</tt>, <tt>n.</tt> <ety>[F. prop., a little piece of paper, or a mark or title, affixed to a bag or bundle, expressing its contents, a label, ticket, OF.<ets>estiquete</ets>, of German origin; cf. LG. <ets>stikke</ets> peg, pin, tack, <ets>stikken</ets> to stick, G. <ets>stecken</ets>. See <er>Stick</er>, and cf. <er>Ticket</er>.]</ety> <def>The forms required by good breeding, or prescribed by authority, to be observed in social or official life; observance of the proprieties of rank and occasion; conventional decorum; ceremonial code of polite society.</def>