The definition of heat is a form of energy that causes a difference in temperature, or the perception of warmth.(noun)
An example of heat is hot water.
Heat is defined as to add warmth to something.(verb)
An example of heat is bringing a kettle of water to a boil.
See heat in Webster's New World College Dictionary
Origin: ME hete < OE hætu < base of hat (see hot), akin to Ger heiss < IE base *kai-, heat
transitive verb, intransitive verb
See heat in American Heritage Dictionary 4
Origin: Middle English hete
Origin: , from Old English hǣtu; see kai- in Indo-European roots.
See heat in Ologies
the ability of light and heat and other forms of radiant energy to cause chemical changes, as hormonal changes in birds causing them to migrate or brood. —actinic, adj.
imperviousness to radiant heat or infrared radiation. Also called athermancy.
the science of measuring heat. —calorimeter, n. —calorimetric, adj.
Rare. one who believed the caloric theory, that heat is a material substance. —caloristic, adj.
the process of generating heat by means of an electric current.
the branch of geology that measures temperatures deep below the surface of the earth; geologic thermometry.
the production or generation of heat. —pyrogenetic, adj.
the chemical process of decomposition under the effect of heat. —pyrolitic, adj.
a type of pyrometer that measures temperature optically or photometrically.
a moderate warmth; lukewarmness. —tepid, adj.
Medicine. the study of heat as a medical remedy or therapy. Also called thermotherapy.
the science or study of the emission of electrons from substances at high temperatures. —thermionic, adj.
the branch of chemistry that studies the relationship of heat to chemical changes, including the production of energy. —thermochemist, n. —thermochemical, adj.
the branch of physics that studies the relationship of heat and mechanical energy and the conversion, in various materials, of one into the other. —thermodynamicist, n. —thermodynamic, thermodynamical, adj.
the production of heat, especially in an animal body by physiological processes. —thermogenic, thermogenous, adj.
1. Engineering, a method of measuring surf ace temperatures by using luminescent materials.
2. a printing or photocopying process using infrared rays and heat.
3. a process of photography using far-infrared radiation; thermal photography. —thermographer, n. —thermographic, adj.
the study of the movement of heat. —thermokinematic, adj.
Archaic. the science and study of heat. Also called thermotics.
Atomic Physics. any luminescence appearing in materials upon application of heat, caused by electron movement which increases as the temperature rises. —thermoluminescent, adj.
Physiology. the dispersion of heat from the body. —thermolytic, adj.
the branch of physics that deals with the measurement of temperature. —thermometric, adj.
an abnormal fear of heat.
a device for giving an approximation of the temperature change of a substance by noting the accompanying change in its volume. —thermoscopic, adj.
the science or study of the equilibrium of heat.
1. Biology. the movement of an organism toward or away from a source of heat.
2. Physiology. the regulation of body temperature by various physiological processes. —thermotactic, thermotaxic, adj.
the property or quality by which matter permits the passage of heat. —transcalent, adj.
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