Microwaves

n. electromagnetic wave of extremely high frequency; cooking device that uses electromagnetic waves to cook food, type of oven

''' Microwaves are  electromagnetic waves with wavelengths shorter than one meter and longer than one millimeter, or frequencies between 300 megahertz and 300 gigahertz. Apparatus and techniques may be described as "microwave" when the wavelengths of signals are roughly the same as the dimensions of the equipment, so that lumped-element circuit theory is inaccurate. As a consequence, practical microwave technique tends to move away from the discrete resistors, capacitors, and inductors used with lower frequency radio waves. Instead, distributed circuit elements and transmission-line theory are more useful methods for design, analysis, and construction of microwave circuits. Open-wire and coaxial transmission lines give way to waveguides, and lumped-element tuned circuits are replaced by cavity resonators or resonant lines.
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Microwave /mi·cro·wave/ a wave of electromagnetic radiation between far infrared and radio waves, regarded as extending from 300,000 to 100 [more]Microwaves - Community and Resources

Noun
1. a short electromagnetic wave (longer than infrared but shorter than radio waves); used for radar and microwave ovens and for transmitting telephone, facsimile, video and data
(hypernym) electromagnetic radiation, electromagnetic wave, nonparticulate radiation
(part-holonym) electromagnetic spectrum
(derivation) micro-cook, zap, nuke
2. kitchen appliance that cooks food by passing an electromagnetic wave through it; heat is produced by the absorption of microwave energy by the water molecules in the food
(synonym) microwave oven
(hypernym) kitchen appliance
(derivation) micro-cook, zap, nuke
Verb
1. cook or heat in a microwave oven; "You can microwave the left-overs"
(synonym) micro-cook, zap, nuke
(hypernym) cook
(derivation) microwave oven
(classification) cooking, cookery, preparation

Electromagnetic radiation with a wavelength of between 1 and 100 millimetres. This region of the electromagnetic spectrum is bounded by radio waves and infrared radiation.