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| a stew of meat, vegetables, potatoes, etc. |
| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
| radio wave | |
| —n | |
| an electromagnetic wave of radio frequency | |
| radio wave
A very low frequency electromagnetic wave (from roughly 30 kilohertz to 100 gigahertz). Radio waves are used for the transmission of radio and television signals; the microwaves used in radar and microwave ovens are also radio waves. Many celestial objects, such as pulsars, emit radio waves. See more at electromagnetic spectrum. |