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:
- Sensation of heat.
- Temperature, or degree of hotness.
- Quantity of thermal energy.
- Radiant heat, or energy of radiation.
2. A horizonal temphorizontal temperature discontinuity layer in a lake in which the temperature falls by at least 1°C per meter depth.
3. A boundary layer in the sea in which temperature changes sharply with depth.
2. Coagulation of tissue by the action of high-frequency currents; used in removal of growths and also used to produce stereotactic lesions in the brain.
3. Destruction and removal of tissue by coagulation utilizing high-frequency electric current.
2. A process in which temperature differentiation within a fluid mixture causes one constituent to flow differently than the mixture as a whole.
2. A method of measuring ventricular blood volume and cardiac output in which a cold or cool indicator; such as, a saline solution or distilled water, is injected and sampled by a thermistor (a kind of thermometer for measuring very small changes in temperature).
2. Capable of withstanding, or able to tolerate, high temperatures.
3. The ability to resist heat.
4. Resistant to the decomposing effects of heat.
2. Of or relating to thermodynamics.
2. The branch science which is concerned with the study of energy and with the relationship of heat transfer and work to other forms of energy.
3. The study of the flow of heat.
4. A branch of science dealing with heat, energy, and the interconversion of these, and with related problems.
Thermodynamics is the physical science that accounts for the transformation of thermal energy into mechanical energy and its equivalent forms in which temperature is a significant factor; such as, electricity and self-organization of complex systems.
2. A condition of elasticity exhibited by a normally rigid material due to an increase in temperature.
2. Electricity generated by heat.
3. Electricity produced by the direct action of heat or the direct conversion of heat into electricity; such as, in a thermocouple.
When two metals are placed in electric contact, electrons flow out of the one in which the electrons are less bound and into the other.
The binding is measured by the location of the so-called Fermi level of electrons in the metal; the higher the level, the lower is the binding.
The Fermi level represents the demarcation in energy within the conduction band of a metal between the energy levels occupied by electrons and those that are unoccupied. It is important in determining the electrical and thermal properties of solids.
The Fermi level is the measure of the energy of the least tightly held electrons within a solid; named for Enrico Fermi, Italian-born American physicist who first proposed it and who was one of the chief architects of the nuclear age.
He developed the mathematical statistics required to clarify a large class of subatomic phenomena, explored nuclear transformations caused by neutrons, and directed the first controlled chain reaction involving nuclear fission.