Radiator (noun)

A device that transfers heat from a hot surface to a cooler surface, such as a heating appliance used in a building to warm the interior.

Origin:

From the latin word radiare, meaning 'to shine'.

Examples:

1. The radiator in the living room wasn't working, so we called a repairman to fix it.
2. In the winter, you can feel the warmth from the radiator when you stand near it.
3. Radiators are an important component of a building's heating system.
4. Some modern radiators are designed to be more energy efficient, using less fuel to produce heat.
5. Radiators come in various shapes and sizes, and can be mounted on walls or floors.