Answer:

giga

Answer	Crossword Clue
GIGA	Prefix on hertz
GIGA	Billion (prefix)
GIGA	Billion (Prefix)

GIGA	Prefix with hertz
GIGA	Inverse of nano-
GIGA	Prefix meaning "billion"
GIGA	Nano- reciprocal
GIGA	Prefix with byte
GIGA	Byte starter
GIGA	Byte opener
GIGA	Prefix with byte or watt

GIGA	Billion: Prefix
GIGA	Prefix with cycle
GIGA	Bigger than mega-
GIGA	Prefix denoting 10 to the ninth power
GIGA	Memory unit prefix
GIGA	Prefix with flop
GIGA	Prefix with watt
GIGA	Prefix between mega- and tera-

GIGA	Prefix for "watt" or "byte"
GIGA	Prefix meaning "one billion"
GIGA	More than mega
GIGA	More than mega-