[ air-shed ]
/ ˈɛərˌʃɛd /
a geographical area within which the air frequently is confined or channeled, with all parts of the area thus being subject to similar conditions of air pollution.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for airshed
On 7th June two of our airmen destroyed an airshed and a Zeppelin north of Brussels.The Childrens' Story of the War, Volume 4 (of 10)|James Edward Parrott