No, a "macrowave" does not exist, at least not in the context of a household appliance. The term "macrowave" is not commonly used or recognized as a cooling device.
Microwaves are specifically designed to generate and emit electromagnetic waves that cause water molecules to vibrate and generate heat. They are primarily used for heating food and beverages.
To cool things, refrigerators or freezers are commonly used. These appliances work by removing heat from the enclosed space, thereby reducing the temperature of the items inside. They do not generate cooling waves like microwaves generate heating waves.
In summary, microwaves are designed for heating, while refrigerators and freezers are used for cooling.