Refrigerant (noun)

1. A substance used to cool or refrigerate something.
2. A chemical used in air conditioners and refrigerators to remove heat from the air or objects.

Origin:

From the latin word "refrigerare" meaning "to cool" and the suffix "-ant" meaning "a substance that does so".

Examples:

1. The refrigerant in the air conditioner is responsible for removing heat from the air.
2. The refrigerant in the refrigerator is responsible for keeping the food cold.
3. The refrigerant is circulated through the coils to absorb heat from the air.
4. The old refrigerant was found to have a negative impact on the ozone layer and was phased out.
5. The new refrigerant is more environmentally friendly and has a lower global warming potential.