g: The force of acceleration due to gravity equal to 32.1739 ft/sec2 or 386 in./sec2.
Gain: The ratio of the output level of a circuit to the input. This will be positive for an amplifier and negative for an attenuator.
Galvanometer: An instrument that measures small electrical currents by means of deflecting magnetic coils.
Gate: Element of a digital circuit. Also one of the terminals of a Field Effect Transistor (FET).
Gigahertz (GHz):1,000,000,000 Hertz; a unit of frequency.
Glitch: An intermittent error in a circuit.
Graticule: The grid lines on a screen for measuring oscilloscope traces.
Greencap: A type of polyester capacitor that the manufacturer dips in green paint to make it distinctive from all other capacitors.
Ground : 1) A conducting connection by which an electric circuit or equipment is connected to the earth to establish and maintain a reference voltage level. 2) The voltage reference point in a circuit. 3). The negative side of DC power supply.