n. A form of hygrometer having wet and dry bulb thermometers, with an adjustable index showing the percentage of moisture in the air, etc.
the GNU version of the Collaborative International Dictionary of English
n. A form of hygrometer having wet and dry bulb thermometers, with an adjustable index showing directly the percentage of moisture in the air, etc.
The Century Dictionary and Cyclopedia
n. A form of hygrometer consisting of a wet-bulb and a drybulb thermometer (see thermometer and psychrometer) supported one on each side of a frame on which is drawn an appropriate scale.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a wet and dry bulb hygrometer
Word Usage
"There is a very ingenious instrument, called the hygrodeik, which indicates the exact amount of moisture in the air."