hygro-, hygr- +

(Greek: moist, moisture, wet, damp)

hygrokinematics
A branch of meteorology that involves the study of the movements of water substances in the atmosphere.
hygrokinesis
A change in the rate of movement of an organism in response to a change in humidity.
hygrokinetic
Relating to a change in the rate of movements of an organism in response to a change in humidity.
hygroklinokinesis
A change in the rate of random movement of an organism expressed as a change in the frequency of turning movements (rate of change of direction) in response to humidity stimulus.
hygroklinokinetic
Characterized by change in the rate of random movement of an organism expressed as a change in the frequency of turning movements in response to humidity stimulus.
hygrology
1. The science dealing with the fluids of the body.
2. The study that deals with the water vapor content (humidity) of the atmosphere.
hygroma
1. An accumulation of fluid in a sac, cyst, or bursa.
2. A cystic swelling containing a serous fluid; such as, cystic lymphangioma (vessels that convey the lymph or colorless fluid that bathes body tissues), housemaid's knee (inflammation of a bursa or fibrous sac), etc.
hygromania
A passion, or craving, for water.
hygromaniac
Someone who has a desire, passion, or craving, for water.
hygrometer
1. A measuring instrument for measuring the relative humidity of the atmosphere.
2. Any of several instruments that measure atmospheric humidity.

The most common type of hygrometer consists of two, side-by-side mercury or electronic thermometers, one of which has a dry bulb, and one of which has a bulb wrapped with a wet cotton or linen wick.

As water evaporates from the wet bulb, it absorbs heat from the thermometer, driving down its temperature reading.

The difference in temperature between the two thermometers is then used to calculate the relative humidity.

Other hygrometers make use of the temperatures at which dew forms and disappears to calculate the relative humidity.

—Based on information from
The American Heritage Science Dictionary;
Houghton Mifflin Company; Boston; 2005; page 310.
hygrometric
Referring to the hygrometer or hygrometry (any of several instruments for measuring the humidity of the atmosphere).
hygrometrical
1. Referring to hygrometry or made with, or according to, the hygrometer; such as, hygrometric observations.
2. Readily absorbing and retaining moisture; such as, hygrometric substances including potash.
hygrometrically
1. Characterized by hygrometry, or made with, or according to, the hygrometer; such as, hygrometric observations.
2. Referring to absorbing and retaining moisture; such as, hygrometric substances including potash.
hygrometry
1. The scientific study and calculation of the relative humidity of the atmosphere.
2. That branch of physics which relates to the determination of the humidity of bodies, particularly of the humidity of air and gases in the atmosphere, with the theory and use of the instruments constructed for this purpose.
hygro-orthokinesis, hygroorthokinesis
A change in the rate of random movement of an organism expressed as a change in the linear velocity in response to a humidity stimulus.

Cross references of word families that refer to "water": aqua-; hydat-; hydro-.