Part 277

<hw>Air"ing</hw> <tt>(#)</tt>, <tt>n.</tt> <p><b>1.</b> <def>A walk or a ride in the open air; a short excursion for health's sake.</def>

<p><b>2.</b> <def>An exposure to air, or to a fire, for warming, drying, etc.; <as>as, the <ex>airing</ex> of linen, or of a room</as>.</def>

<h1>Air jacket</h1> <Xpage=35>

<hw>Air" jack`et</hw> <tt>(#)</tt>. <def> A jacket having air-tight cells, or cavities which can be filled with air, to render persons buoyant in swimming.</def>

<h1>Airless</h1> <Xpage=35>

<hw>Air"less</hw> <tt>(#)</tt>, <tt>a.</tt> <def>Not open to a free current of air; wanting fresh air, or communication with the open air.</def>

<h1>Air level</h1> <Xpage=35>

<hw>Air" lev`el</hw> <tt>(#)</tt>. <def> Spirit level. See <er>Level</er>.</def>

<h1>Airlike</h1> <Xpage=35>

<hw>Air"like`</hw> <tt>(#)</tt>, <tt>a.</tt> <def>Resembling air.</def>

<h1>Airling</h1> <Xpage=35>

<hw>Air"ling</hw> <tt>(#)</tt>, <tt>n.</tt> <def>A thoughtless, gay person.</def> <mark>[Obs.]</mark> "Slight <i>airlings</i>."

<i>B. Jonson.</i>

<h1>Airometer</h1> <Xpage=35>

<hw>Air*om"e*ter</hw> <tt>(#)</tt>, <tt>n.</tt> <ety>[<ets>Air</ets> + <ets>-meter</ets>.]</ety> <def>A hollow cylinder to contain air. It is closed above and open below, and has its open end plunged into water.</def>

<h1>Air pipe</h1> <Xpage=35>

<hw>Air" pipe`</hw> <tt>(#)</tt>. <def> A pipe for the passage of air; esp. a ventilating pipe.</def>

<h1>Air plant</h1> <Xpage=35>

<hw>Air" plant`</hw> <tt>(#)</tt>. <fld>(Bot.)</fld> <def>A plant deriving its sustenance from the air alone; an a\'89rophyte.</def>

<note>&hand; The "Florida moss" <spn>(Tillandsia)</spn>, many tropical orchids, and most mosses and lichens are air plants. Those which are lodged upon trees, but not parasitic on them, are <i>epiphytes</i>.</note>

<h1>Air poise</h1> <Xpage=35>

<hw>Air" poise`</hw> <tt>(#)</tt>. <ety>[See <er>Poise</er>.]</ety> <def>A<?/ <?/ measure the weight of air.</def>

<h1>Air pump</h1> <Xpage=35>

<hw>Air" pump`</hw> <tt>(#)</tt>. <p><b>1.</b> <fld>(Physics)</fld> <def>A kind of pump for exhausting air from a vessel or closed space; also, a pump to condense air of force in into a closed space.</def>

<p><b>2.</b> <fld>(Steam Engines)</fld> <def>A pump used to exhaust from a condenser the condensed steam, the water used for condensing, and any commingled air.</def>

<h1>Air sac</h1> <Xpage=35>

<hw>Air" sac`</hw> <tt>(#)</tt>. <fld>(Anat.)</fld> <def>One of the spaces in different parts. of the bodies of birds, which are filled with air and connected with the air passages of the lungs; an air cell.</def>

<h1>Air shaft</h1> <Xpage=35>