Inability to tolerate or to be comfortable in warm or hot environments.

In a steam boiler, the aggregate surface exposed to fire or to the heated products of combustion, especially of all the plates or sheets that are exposed to water on their opposite surfaces.

Fuel made from denatured and jellied alcohol and contained in a canister with a removable top, designed to be burned directly from that canister.

plural of heat haze

(space science) A shield designed of a substance that absorbs excessive heat from an outside source by either dissipating, reflecting or simply absorbing the heat.

plural of heat shield

thermal grease

(physics) The amount of heat absorbed by unit mass of a material, at its melting point, that causes a phase transition from solid to liquid

(physics) The amount of heat needed to change a unit mass of material from a liquid to a gas at its boiling point

heat produced from within the body of a (warmblooded) animal as opposed to absorbed from the environment