This is a sample definition for a sample word. Words of the Day are selected from the Words of the Day section.
- Hertz; the international unit for measuring frequency, equivalent to cycles per second. One megahertz (MHz) is one million hertz. One gigahertz (GHz) is one billion hertz. The standard U.S. electrical power frequency is 60 Hz, the AM broadcast radio frequency band is 0.55-1.6 MHz, the FM broadcast radio frequency band is 88-108 MHz, and IEEE 802.11 WLANs operate at 2.4 GHz and 5 GHz.