Geophysical fluid dynamics, in its broadest meaning, refers to the fluid dynamics of naturally occurring flows, such as lava flows, oceans, and planetary atmospheres, on Earth and other planets.

Geophysics is a subject of natural science concerned with the physical processes and physical properties of the Earth and its surrounding space environment, and the use of quantitative methods for their analysis.

American entrepreneur and engineer who introduced an AC-based power distribution network in 1886.

Geotechnical engineering, also known as geotechnics, is the branch of civil engineering concerned with the engineering behavior of earth materials.

These vessels operate on a site to detect the presence of any subsea hydrocarbon reservoirs. Geotechnical ships carry out corings, that is the picking up of seabed samples.

Geothermal Energy is the energy which is naturally available within the earths sub subsurface. For electricity generation higher geothermal temperatures are required.

Geothermal resource exploration, development, and production draw on the techniques of both the mining and oil/gas industries.

Geothermal gradient is the rate of temperature change with respect to increasing depth in Earth's interior.

A heat pump that uses the earth as a heat exchanger to either cool or heat a building. It uses the earth as a heat source in the winter (heating) and as a heat sink (cooling) in the summer. Also known as a ground source heat pump.

Geothermal heating is the direct use of geothermal energy for some heating applications.

Geothermal power is power generated by geothermal energy.

A geothermal spring is a spring produced by the emergence of geothermally heated groundwater that rises from the Earth's crust.

A geyser is a spring characterized by an intermittent discharge of water ejected turbulently and accompanied by steam.

In thermodynamics, the Gibbs free energy is a thermodynamic potential that can be used to calculate the maximum reversible work that may be performed by a thermodynamic system at a constant temperature and pressure.

Electric power unit equal to one billion watts

Electric power unit equal to one billion watts used per hour.

A collective term for primary supporting structural members.

Similar to the Darrieus wind turbine but employing straight vertical blades attached to the mast by horizontal supports ressembling a H.

A gland is a general type of stuffing box, used to seal a rotating or reciprocating shaft against a fluid.

Glare is the sensation produced by luminance within the visual field that is sufficiently greater than the luminance to which the eyes are adapted causing annoyance, discomfort or loss of visual performance and visibility.