Etymology
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aerophyte (n.)
"plant which lives exclusively on air," 1838, perhaps via French aerophyte, from aero- "air" + -phyte "plant."
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aloft (adv.)
"on high, in the air," c. 1200, from a Scandinavian source such as Old Norse a lopt "up above," literally "up in the air," from a "in, on" (see on) + lopt "sky, air, atmosphere; loft, upper room," from the general Germanic word for "air" (cognate with Gothic luftus, Old High German luft, Old English lyft "air;" see loft (n.)). Scandinavian -pt- pronounced like -ft-. The Old English equivalent was on þa lyft.
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airing (n.)
"action of exposing to air," c. 1600, verbal noun from air (v.). Meaning "display, public exposure" is from 1870.
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aeration (n.)

1570s, "act of exposing to air," from French aération, noun of action from aérer (v.), from Latin aer "the air, atmosphere" (see air (n.1)). In some cases, from aerate. In early scientific writing, aer/aër was used for specific kinds of air, a sense later given to gas (n.1).

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R.A.F. 
also RAF, initialism (acronym) for Royal Air Force, founded 1918 by consolidation of Royal Flying Corps and Royal Naval Air Service.
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malaria (n.)

1740, "unwholesome air, air contaminated with the poison producing intermittent and remittent fever," from Italian mal'aria, from mala aria, literally "bad air," from mala "bad" (fem. of malo, from Latin malus; see mal-) + aria "air" (see air (n.1)). Probably first used by Italian physician Francisco Torti (1658-1741). By 1866 it had come to be used of the disease itself (earlier malaria fever, by 1814). The disease, now known to be mosquito-borne, once was thought to be caused by foul air in marshy districts. Replaced native ague.

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aerogram (n.)
also aerogramme, 1899, "message sent through the air" (by radio waves, i.e. "wireless telegraphy"), from aero- + -gram. From 1920 as "air-mail letter."
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airship (n.)
also air-ship, 1819, from air (n.1) + ship (n.). From 1888 as a translation of German Luftschiff "motor-driver dirigible."
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airplane (n.)
1907, air-plane, from air (n.1) + plane (n.1); though the earliest uses are British, the word caught on in American English, where it largely superseded earlier aeroplane (1873 in this sense and still common in British English). Aircraft as "airplane" also is from 1907. Lord Byron, speculating on future travel, used air-vessel (1822); and in 1865 aeromotive (based on locomotive) was used, also air-boat (1870).
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pneumatic (adj.)

"moved or played by means of air; of or pertaining to air or gases," 1650s, from Latin pneumaticus "of the wind, belonging to the air," from Greek pneumatikos "of wind or air" (which is attested mainly as "of spirit, spiritual"), from pneuma (genitive pneumatos) "the wind," also "breath" (see pneuma). Earlier was pneumatical (c. 1600). The pneumatic-dispatch tube was so called by 1859 (in Paris, pneumatique).

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