to heat or
91heat prostration — heat′ prostra tion n. pat heat exhaustion • Etymology: 1935–40 …
92heat pump — heat′ pump n. ene thr a device that uses a compressible refrigerant to transfer heat in a reversible process from one body, as the ground, air, or water, to another body, as a building • Etymology: 1890–95 …
93heat rash — heat′ rash n. pat prickly heat • Etymology: 1885–90 …
94heat sink — heat′ sink n. thr an environment or medium that absorbs excess heat, as in an electronic circuit • Etymology: 1935–40 …
95heat of fusion — Heat released from a substance to change it from a liquid state to a solid state. The heat of fusion of ice is 144 Btu per pound (335 kJ/kg) …
96heat capacity — n. the amount of heat required to raise the temperature of a substance or system one degree, usually expressed in calories per degree Celsius …
97heat engine — n. an engine for changing heat into mechanical energy, such as a steam engine or gasoline engine …
98heat exchanger — n. any device, as a radiator or a condenser, for transferring heat energy to a cooler medium from a warmer one for heating or cooling purposes …
99heat of fusion — n. the amount of heat needed to melt a unit mass of a solid that has just reached the melting point …
100heat of vaporization — n. the amount of heat needed to turn one gram of a liquid into a vapor, without a rise in temperature of the liquid …