DICTIONARY OF AVIATION 157
distinguishable from them by their (usually) nocturnal habit and nen^clubd antennae.
motor 'moo-taz n. an apparatus or mechanism for moving machinery or vehicles of locomotion; a motory engin : sometimes distinguisht from steam-engine.
motor-airship 'moo-t3z,e:z-$ip n. an airship or aerial ve- hicle propeld by a motor; a power^dnven airship.
motor-balloon 'moo-taz-bs^uun n. a balloon propeld by a motor; a motor^driven balloon.
motor-driven 'moo-taz/lrivan adj. driven or propeld by a motor: as, a *motor^driven kite; a *motor?driven flyer.
motorless 'moo-taz-tes adj. having no motor; without a mo- tor : as, a *motorless soarmg^machine.
motor-propelled 'moo-tDz-p^peld adj. [also spelt motor* propeld] propeld by a motor, as a kite or airship; motor? driven.
motory 'moo-ta-zi adj. related to or causing motion; ki- netic.
mount mount intr. go up; ascend; rise; make an ascension.
mountain-breeze 'maun-tin^ziiz n. same meaning as mount ain f wind.
mountain-sickness 'maun-tin,sikNis n. a sickness or mal- ady caused by breathing the rarefied air of mountains heights, or to ascending or descending rapidly at considera- ble altitudes.
mountain- wind / maun-tin / wind n. a very regular wind normally blowing up a mountain by day and down by night, due to the heat of the inclined surface of the mountain ; a mountainsbreeze.
mounting 'maun-tirj n. the mode in uuhich a flying^machine is mounted or set up, as upon skids or wheels, or both.
mouth mau0 n. the orifis or opening at the lower end of the neck of the gasbag of a balloon.
muffler 'niAftaz n. a device to muffle, deden, or silence the explosiv puff of the exhaust of hot gases from an in- ternal^combustion motor; an exhaustemuf f ler ; a silencer.
multiplane 'mAhi/pteen n. a flying^machine with several or many sustaining?planes, especially many superposed sus- taining^planes ; a multiple^wingd aeroplane f lying^machine : distinguisht from monoplane and biplane.
multiplane 'niAlt^pteen adj. having several or many planes or aeroplanes; a pelyplane.
multiple- wing ^Altipa^wirj adj. having several wings; having more than one or two wings ; multiple^wingd : said of gliders or f lying^machines ; multiple^wingd.
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