What does GND stand for?

What does GND mean?

GND	Ground Academic & Science » Geology
GND	Ground Academic & Science » Ocean Science
GND	Ground Academic & Science » Physics
GND	Ground Academic & Science » Meteorology
GND	Ground Governmental » Military
GND	GrouND Governmental » NASA
GND	Gennum Corporation Business » Stock Exchange
GND	Ground (voltage level) Academic & Science » Electronics
GND	Graduate Non-Degree program Academic & Science » Academic Degrees
GND	Grama Niladari Division Community
GND	Greater North Dakota Regional » States
GND	Grenada, Windward Islands Regional » Airport Codes
GND	Gun News Daily Community » Media
GND	Zulgo-Gemzek: A language of Cameroon Regional » Language Codes (3 Letters)
GND	Graphic Not Done Miscellaneous » Unclassified
GND	The Girl Next Door Miscellaneous » Unclassified
GND	Guilty Nervous Disorder Miscellaneous » Unclassified
GND	Girls Need D Miscellaneous » Unclassified
GND	Global Information Grid (GIG) Network Defense Governmental » Military