- a thermometer having a bulb that is kept moistened when humidity determinations are being made with a psychrometer.
Compare dry-bulb thermometer.
Origin of wet-bulb thermometer
First recorded in 1840–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- a thermometer the bulb of which is covered by a moist muslin bag, used together with a dry-bulb thermometer to measure humidity