heat barrier; heat content; heat dissipation; heat energy; heat engine; heat exchanger; heat exhaustion; heat flash; heat hyperpyrexia; heat lamp; heat lightning; heat of condensation; heat of dissociation; heat of formation; heat of fusion; heat of solidification; heat of solution; heat of sublimation; heat of transformation; heat of vaporisation; heat of vaporization; heat prostration; heat pump; heat rash; heat ray; heat shield; heat sink; heat unit; heat up; heat wave; heat-absorbing; heat-releasing; heat-seeking missile;