wet-bulb depression

American  

[wet-buhlb di-presh-uhn] / ˈwɛtˌbʌlb dɪˌprɛʃ ən /

noun

Meteorology.

1. the difference between the dry-bulb temperature and the wet-bulb temperature, with a larger depression representing less atmospheric humidity.

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Etymology

Origin of wet-bulb depression

First recorded in 1820–30

Example Sentences

Aitken for some years made observations on the haze in the air at Falkirk by simply noting the direction of the wind, the wet-bulb depression at the time, and the transparency of the air.

From Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 8 "Dubner" to "Dyeing" by Various