Hygrometer and Psychrometer

Hygrometer noun - Measuring instrument for measuring the relative humidity of the atmosphere.

Psychrometer and hygrometer are semantically related. In some cases you can use "Psychrometer" instead a noun "Hygrometer".

Psychrometer noun - A hygrometer consisting of a dry-bulb thermometer and a wet-bulb thermometer; their difference indicates the dryness of the surrounding air.

Hygrometer and psychrometer are semantically related. You can use "Hygrometer" instead a noun "Psychrometer".