Condenser (noun)

1. A device or apparatus used to condense a substance, especially a gas, into a liquid form.
2. A component in a refrigeration or air conditioning system that removes heat from the refrigerant and releases it to the surrounding air.
3. An optical system in a microscope or telescope that focuses light onto the eyepiece or camera.
4. An electrical component that stores energy in an electrical circuit.

Origin:

From latin condensare, to condense, make dense.

Examples:

1. The steam was passed through a condenser to convert it back into water.
2. The air conditioning system's condenser was cleaned to improve its performance.
3. The condenser in the microscope helped to magnify the specimen for the researcher to study.
4. The high voltage condenser stored the energy required to power the electric fence.
5. The condenser in the refrigeration unit was replaced to fix the problem with the cooling system.