Part 1508

<hw>Butt" shaft`</hw> <tt>(?)</tt> <def>An arrow without a barb, for shooting at butts; an arrow.</def> <altsp>[Also <asp>but shaft</asp>.]</altsp>

<i>Shak.</i>

<h1>Butt weld</h1> <Xpage=197>

<hw>Butt" weld`</hw> <tt>(?)</tt>. <def>See <i>Butt weld</i>, under <er>Butt</er>.</def>

<h1>Buttweld</h1> <Xpage=197>

<hw>Butt"weld`</hw>, <tt>v. t.</tt> <def>To unite by a butt weld.</def>

<h1>Butty</h1> <Xpage=197>

<hw>But"ty</hw> <tt>(?)</tt>, <tt>n.</tt> <fld>(Mining)</fld> <def>One who mines by contract, at so much per ton of coal or ore.</def>

<h1>Butyl</h1> <Xpage=197>

<hw>Bu"tyl</hw> <tt>(?)</tt>, <tt>n.</tt> <ety>[L. <ets>but</ets>yrum butter + <ets>-yl</ets>. See <er>Butter</er>.]</ety> <fld>(Chem.)</fld> <def>A compound radical, regarded as butane, less one atom of hydrogen.</def>

<h1>Butylene</h1> <Xpage=197>

<hw>Bu"ty*lene</hw> <tt>(?)</tt>, <tt>n.</tt> <ety>[From <er>Butyl</er>.]</ety> <fld>(Chem.)</fld> <def>Any one of three metameric hydrocarbons, <chform>C4H8</chform>, of the ethylene series. They are gaseous or easily liquefiable.</def>

<h1>Butyraceous</h1> <Xpage=197>

<hw>Bu`ty*ra"ceous</hw> <tt>(?)</tt>, <tt>a.</tt> <ety>[L. <ets>butyrum</ets> butter. See <er>Butter</er>.]</ety> <def>Having the qualities of butter; resembling butter.</def>

<h1>Butyrate</h1> <Xpage=197>

<hw>Bu"ty*rate</hw> <tt>(?)</tt>, <tt>n.</tt> <fld>(Chem.)</fld> <def>A salt of butyric acid.</def>

<h1>Butyric</h1> <Xpage=197>

<hw>Bu*tyr"ic</hw> <tt>(?)</tt>, <tt>a.</tt> <fld>(Chem.)</fld> <def>Pertaining to, or derived from, butter.</def>

<cs><col>Butyric acid</col>, <cd><chform>C3H7.CO2H</chform>, an acid found in butter; an oily, limpid fluid, having the smell of rancid butter, and an acrid taste, with a sweetish aftertaste, like that of ether. There are two metameric butyric acids, called in distinction the <i>normal-<i> and <i>iso-butyric<i> acid. The normal butyric acid is the one common in rancid butter.</cd></cs>

<h1>Butyrin</h1> <Xpage=197>

<hw>Bu"ty*rin</hw> <tt>(?)</tt>, <tt>n.</tt> <fld>(Physiol. Chem.)</fld> <def>A butyrate of glycerin; a fat contained in small quantity in milk, which helps to give to butter its peculiar flavor.</def>

<h1>Butyrometer</h1> <Xpage=197>

<hw>Bu`ty*rom"e*ter</hw> <tt>(?)</tt>, <tt>n.</tt> <ety>[L. <ets>butyrum</ets> butter + <ets>-meter</ets>.]</ety> <def>An instrument for determining the amount of fatty matter or butter contained in a sample of milk.</def>

<h1>Butyrone</h1> <Xpage=197>

<hw>Bu"ty*rone</hw> <tt>(?)</tt>, <tt>n.</tt> <ety>[<ets>Butyr</ets>ic + <ets>-one</ets>.]</ety> <fld>(Chem.)</fld> <def>A liquid ketone obtained by heating calcium butyrate.</def>

<h1>Butyrous</h1> <Xpage=197>

<hw>Bu"ty*rous</hw> <tt>(?)</tt>, <tt>a.</tt> <def>Butyraceous.</def>

<h1>Buxeous</h1> <Xpage=197>