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thermal British & World English

Relating to heat

thermal noise British & World English

Electrical fluctuations arising from the random thermal motion of electrons

thermal paper British & World English

Heat-sensitive paper used in thermal printers

thermal shock British & World English

A sudden temperature fluctuation causing stress in an object or substance

thermal unit British & World English

A unit of measurement for heat

thermal imaging British & World English

The technique of using the heat given off by an object to produce an image of it or to locate it

thermal neutron British & World English

A neutron in thermal equilibrium with its surroundings

thermal printer British & World English

A printer in which fine heated pins form characters on heat-sensitive paper

thermal reactor British & World English

A nuclear reactor using thermal neutrons

thermal spring British & World English

A spring of naturally hot water

thermal capacity British & World English

The number of heat units needed to raise the temperature of a body by one degree

thermal efficiency British & World English

The efficiency of a heat engine measured by the ratio of the work done by it to the heat supplied to it

thermal diffusivity British & World English

The thermal conductivity of a substance divided by the product of its density and its specific heat capacity

British thermal unit British & World English

The amount of heat needed to raise 1 lb of water at maximum density through one degree Fahrenheit, equivalent to 1.055 × 103 joules

sympto-thermal method British & World English

A contraceptive method based on the monitoring of a woman’s body temperature and of physical symptoms related to ovulation, enabling awareness of the time of the month at which sexual intercourse is most likely to lead to pregnancy

thermal depolymerization British & World English

A process of breaking down complex hydrocarbons in an oxygen-deprived, heated and pressurized environment to yield simpler compounds that can be used to produce fuels

inertia British & World English

Resistance to change in some other physical property

electrothermal British & World English

Relating to heat derived from electricity

thermal inversion in inversion British & World English

A reversal of the normal decrease of air temperature with altitude, or of water temperature with depth

temperature in inversion British & World English

A reversal of the normal decrease of air temperature with altitude, or of water temperature with depth

thermal conductivity in conductivity British & World English

The rate at which heat passes through a specified material, expressed as the amount of heat that flows per unit time through a unit area with a temperature gradient of one degree per unit distance