Refrigerator (often called a "fridge" for short) is a cooling appliance comprising
a thermally insulated compartment and a mechanism to transfer heat from it
to the external environment, cooling the contents to a temperature below
ambient. Refrigerators are extensively used to store foods which deteriorate
at ambient temperatures; spoilage from bacterial growth and other processes
is much slower at low temperatures.
Refrigerators maintain a temperature a few degrees above the freezing
point of water; similar devices which maintain temperatures below the
freezing point of water are called "freezers". The refrigerator is a relatively modern invention amongst kitchen appliances. It replaced the
common icebox which had been a household item for almost a century and a
half prior, and is sometimes still called by the original name "icebox".
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