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air cock

noun
  1. Machinery. a special type of valve for controlling the flow of air.
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Origin of air cock

First recorded in 1790–1800
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for air cock

Historical Examples

  • There is also a valve or air-cock in the steam-chest, under the control of the engineer.

    Illustrated Catalogue of Locomotives

    M. Baird, et. al..

  • As soon as the water-valve was closed and the air-cock opened, the compressed air blew all of the water out of the tube.