humidity

in atmospheric chemistry
https://doi.org/10.1351/goldbook.H02870
A general term referring to the water content of a gas.
See: relative humidity
Source:
PAC, 1990, 62, 2167. 'Glossary of atmospheric chemistry terms (Recommendations 1990)' on page 2194 (https://doi.org/10.1351/pac199062112167)