Artificial intelligent assistant

air-gun

ˈair-gun
  [air- 7.]
  (See quot.)

1753 Chambers Cycl. Supp., Air-gun, See the article Wind-gun [No such article]. 1787 Darwin in Phil. Trans. LXXVIII. 44 The blast from an air-gun was repeatedly thrown on the bulb of a thermometer. 1812 Scott in Lockhart Life (1839) III. 356 To shoot one of them with an air-gun. 1829 Nat. Philos. I. vi. §52 (U.K.S.) The air-gun is an instrument for projecting balls, or other missiles, by the elastic force of condensed air.

Oxford English Dictionary

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