Roget's Thesaurus: Entry 338 (Air)

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#338. Air. -- N. air &c. (gas) 334; common air, atmospheric air; atmosphere; aerosphere[obs].

open air; sky, welkin; blue sky; cloud &c. 353.

weather, climate, rise and fall of the barometer, isobar.

[Science of air] aerology, aerometry[obs], aeroscopy[obs], aeroscopy[obs], aerography[obs]; meteorology, climatology; pneumatics; eudioscope[obs], baroscope[obs], aeroscope[obs], eudiometer[obs], barometer, aerometer[obs]; aneroid, baroscope[obs]; weather gauge, weather glass, weather cock.

exposure to the air, exposure to the weather; ventilation; aerostation[obs], aeronautics, aeronaut.

V. air, ventilate, fan &c. (wind) 349.

Adj. containing air, flatulent, effervescent; windy &c. 349.

atmospheric, airy; aerial, aeriform[obs]; meteorological; weatherwise[obs].

Adv. in the open air, a la belle etoile[Fr], al fresco; sub jove dio[Lat].