thermo-, therm-, thermi-, -thermia, -therm, -thermal, -thermic, -thermias, -thermies, -thermous, -thermy

(Greek: heat, heating, heater, hot, warm)

The term heat is employed in ordinary language in different senses. Some scientists distinguish four principal applications of the term:

  1. Sensation of heat.
  2. Temperature, or degree of hotness.
  3. Quantity of thermal energy.
  4. Radiant heat, or energy of radiation.

thermoregulator
A highly accurate and sensitive thermostat.
thermoregulatory center
The hypothalamic center in the body which regulates and controls body heat.
thermoresistance
Not affected by changing temperatures.
thermoscope
1. An instrument for indicating slight differences of temperature without registering or recording them.
2. An instrument for detecting temperature changes in a substance by observing corresponding volume changes.
3. The earliest known version of a thermometer, developed by Galileo in 1592, using air in a tube instead of liquid.
thermosensitive (adjective), more thermosensitive, most thermosensitive
Relating to being able to feel heat too easily: The neighbor's dog was very thermosensitive; so, on hot days she tried to stay cool by going under their shady porch.
thermosensitivity (s) (noun),thermosensitivities (pl)
Physical awareness of heat or being affected by such changes of temperatures: The doctor was puzzled by the excessive thermosensitivity of Mrs. Jones because she was not responding to the medication he prescribed to regulate her reactions to such temperature changes.
thermoset, thermosetting
1. A classification for materials that become hardened or cured by the application of heat; such as, acrylic resin.
2. A description of a group of polymers which soften when initially heated, then harden and condense in bulk and retain a permanent shape.

They cannot be softened or reprocessed by reheating.

thermosis
Any change that takes place in an organism because of the effect of heat.
thermosphere
In meteorology, the atmospheric layer, constituting essentially all of the atmosphere above the mesosphere (that is, above about 80-90 km altitude), in which temperature increases with height; includes the exosphere and most or all of the ionosphere.

In the area above the mesosphere, the temperature increases with altitude up to about 200 km, and above that it varies widely depending on the degree of solar activity with temperatures as high as 2000 degrees C are said to be possible.

thermostable
1. Relatively stable or resistant to heat.
2. Not readily subject to alteration or destruction by heat.
thermostad
A layer of the ocean in which the vertical change of temperature is very slight.
thermostasis
The maintenance of a stable body temperature in warm-blooded animals; such as, mammals and birds, at a set value.
thermostat
1. An apparatus for the automatic regulation of heat, as in an incubator.
2. A device used to control the temperature in a room, building, or other enclosure; hotter or cooler air is supplied as necessary to maintain the temperature at the same level as the setting on the thermostat.
thermostatic
Referring to a thermostat or a device for the automatic control of a heating or cooling system.
thermostatics
The study of thermodynamic systems that are in thermal equilibrium.

Quiz You can find self-scoring quizzes over many of the words in this subject area by going to this Thermo- Vocabulary Quizzes page.

Related "heat, hot" word units: ferv-; pyreto-.

Related "bubble" word unit: ebulli-.