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swamp cooler (plural swamp coolers)

  1. (informal) An evaporative cooling device; a device that cools air by blowing it through or across a moist pad or membrane.
    • 2022, N. K. Jemisin, The World We Make, Orbit, page 170:
      Kind of like sitting five feet away from a swamp cooler on a hot day: you feel something approximating a breeze and maybe it’s even cool, but mostly you just end up frustrated and sticky.

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