circulator
Definitions
A device, such as a fan or pump, that keeps a fluid or gas in motion within a closed system.
A specialized component in microwave electronics that directs electromagnetic signals from one port to the next in a specific sequence.
A person or thing that distributes or circulates items, such as a newspaper carrier or a petition gatherer.
Examples
The HVAC technician installed a new circulator to ensure the hot water reached every radiator in the house.
In microwave engineering, a circulator is a passive device used to control the direction of signal flow.