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Air curtain

a strong current of temperature-controlled air in an entryway, used instead of a door.
Historical Examples

The big man with the tiny child on his shoulder pushed through the air curtain that kept the warm humid air out of the shop.
Anything You Can Do … Gordon Randall Garrett

Opposite the air curtain was a huge sliding door, closed at the moment, which probably led to a freight elevator.
Unwise Child Gordon Randall Garrett

an air stream across a doorway to exclude draughts, etc


Read Also:

  • Air cushion

    an inflatable, airtight cushion. (def 2). an air bag. Historical Examples Politeness is like an air cushion: there may be nothing in it, but it eases our jolts wonderfully. The Man Who Pleases and the Woman Who Charms John A. Cone I don’t know whether someone punctured an air cushion just then, or whether it […]

  • Air cushion vehicle

    (def 2).

  • Air cylinder

    a cylinder containing air, especially one equipped with a piston and used as a device for checking the recoil of a gun. Historical Examples The air cylinder was water-jacketed with salt water supplied from the circulating water pumps. Transactions of the American Society of Civil Engineers, Vol. LXVIII, Sept. 1910 B. H. M. Hewett The […]

  • Air dam

    a spoiler mounted at the front of an automobile to reduce air flow on the underside of the chassis to increase stability. noun any device, such as a spoiler, that reduces air resistance and increases the stability of a car, aircraft, etc

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