Gi

Giant Molecular Cloud
Massive clouds of gas in interstellar space composed primarily of hydrogen molecules, though also containing other molecules observable by radio telescopes.
GiB
Abbreviation of gibibyte, equal to two to the power of thirty bytes.
Gibbs Free Energy
A function of the system related to Suniv. It is used to determine the spontaneity of a reaction.
Gibbsite
White crystalline mineral consisting of aluminum hydroxide; a constituent of bauxite and a source of alumina.
gibibyte
Equal to two to the power of thirty bytes.
giga
Prefix representing a multiplication of 109
Giga electron Volt
One billion electron Volts.
Gigabyte
One billion bytes.
GigaFLOPS
One billion floating-point operations per second.
Gigahertz
109 cycles per second.
Gilding Metal
A form of brass, comprising 95% copper and 5% zinc. Used to make items that were to be gilded.

Gill
An organ used by fish to get oxygen from water so that they can ′breathe′.
Gimbal
A mechanical frame, with two perpendicular intersecting axes of rotation, used to support and furnish a gyro wheel with the necessary freedom to tilt in any direction.
Gimlet
A one handed tool with a wooden T handle and a metal spike with a small screw on the tip.
Girder
A beam, usually made from concrete or steel, that is designed to strengthen another structural element.
Girder Spanner
An adjustable spanner with jaws at right angles to the handle.
Given
Information assumed to be true in a proof.