Cooldown is, in numerous video games, the minimum length of time that the player needs to wait after using an ability before they can use it again.

Cooldown Transients in Cryogenic Transfer Lines
Passive cooldown performance of a 65?MW integral reactor
120 Hz pulse tube cryocooler for fast cooldown to 50 K
MiniGRAIL progress report 2001: the first cooldown
120?Hz pulse tube cryocooler for fast cooldown to 50?K
Simulation and analysis of transient cooldown natural convection experiments
Microprocessor controlled lamp flashing system with cooldown protection
Accident management following loss-of-coolant accidents during cooldown in a Westinghouse two-loop PWR
Thermal response of a modular high temperature reactor during passive cooldown under pressurized and depressurized conditions
Fabrication of freestanding 2″‐GaN wafers by hydride vapour phase epitaxy and self‐separation during cooldown