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.

endothermal
1. Maintaining a constant body temperature despite changes in the temperature of the environment.
2. A description of a chemical reaction in which heat is absorbed.
endothermia
1. Characterized by or accompanied by the absorption of heat, as a chemical reaction accompanied by absorption of heat and to which heat must be supplied if it is to proceed.
2. Storing up heat or energy in a potential form.
endothermic
1. Describing an organism; such as, a mammal or bird, that maintains its body temperature at a stable level largely independent of (and typically higher than) the ambient temperature, primarily using generation of heat internal to the animal.
2. Heat absorbing; as, in a chemical reaction.
endothermic reaction, endothermic process
1. A chemical reaction during which heat is absorbed.
2. Warm-blooded animals; such as, birds or mammals; maintaining a body temperature largely independent of the temperature of the environment; homoiothermic.
3. Characterized by, or attended with, the absorption of heat.
4. Also known as homoiotherm.
endothermy
Heating of the body tissues due to their resistance to the passage of high-frequency electromagnetic radiation, electric currents, or ultrasonic waves.

Tissues may be either simply warmed (medical endothermy) or coagulated and destroyed (surgical endothermy).

erythromelalgia, erythermalgia
1. Throbbing and burning pain in the skin often brought about by exertion or heat, affecting the hands and feet, accompanied by a mottled redness of the parts with increased skin temperature.
2. A rare disorder of middle age, characterized by paroxysmal attacks of severe burning pain, reddening, hyperalgesia and sweating, involving one or more extremities, usually both feet; the attacks can be triggered by heat, and are usually relieved by cold and limb elevation.
3. A disease affecting the feet and sometimes the hands, marked by paroxysmal, bilateral vasodilation with burning pain, increased skin temperature, and redness.
eurithermophilous
In biology, capable of living in a wide range of temperatures.
eurytherm
An organism which is tolerant of a wide range of temperatures.
eurythermal
An organism which is able to grow in a wide range of temperatures, said of bacteria capable of good growth from 28°C to 50°C and above.
eurythermic
A descriptive reference to an organism which is able to tolerate a wide range of temperatures in its environment.
eurythermophile
Tolerant of (even a fondness for) a wide range of relatively high temperatures.
eurythermophilic
A descriptive reference to organisms which can tolerate a wide range of relatively high temperatures.
eurythermophily
eurythermous
1. A reference to an organism capable of maintaining itself over a wide temperature range; tolerant of a wide range of temperatures.
2. Able to tolerate a wide range of heat.
euthermic
At an optimal temperature.

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-.