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A heat engine; a hot-air engine.

A neurosis caused by exposure to heat.

Neutrality as regards heat effects.

Heat-loving; -- applied esp. to certain bacteria.

A telephone involving heat effects, as changes in temperature (hence in length) due to pulsations of the line current in a fine wire connected with the receiver diaphragm.

An apparatus for conveying heat, as a case containing material which retains its heat for a considerable period.

An instrument of extreme sensibility, used to determine slight differences and degrees of heat. It is composed of alternate bars of antimony and bismuth, or any two metals having different capacities for the conduction of heat, connected with an astatic galvanometer, which is very sensibly affected by the electric curr…

An instrument for indicating changes of temperature without indicating the degree of heat by which it is affected; especially, an instrument contrived by Count Rumford which, as modified by Professor Leslie, was afterward called the differential thermometer.

Capable of being heated to or somewhat above 55º C. without loss of special properties; -- said of immune substances, etc.

regulating temperature by the unequal expansion of different metals, liquids, or gases by heat, as in opening or closing the damper of a stove, or the like, as the heat becomes greater or less than is desired.

Influenced in its contraction by heat or cold; -- said of a muscle.

A tank containing pipes through which circulates steam, water, air, or the like, for heating or cooling; -- used in some heating and ventilation systems.

The property possessed by protoplasm of moving under the influence of heat.

A process of increasing the strength of wrought iron by heating it to a determinate temperature, and giving to it, while in that state, a mechanical strain or tension in the direction in which the strength is afterward to be exerted.

Treatment of disease by heat, esp. by hot air.

Of or pertaining to heat; produced by heat; as, thermotical phenomena. Whewell.

The science of heat. Whewell.

loric or dilute sulphuric acid, then taking an impression with a press, and next strongly heating this impression.

Of or relating to heat and electricity; especially, relating to thermal effects produced by voltaic action. Faraday.

A process of electric welding in which heat is developed by a large current passing through the metal.