gear	Nautically, gear applies to the lines and pulleys for a given sail or mast. More broadly, gear is used to describe the accessory or fundamental equipment of a larger device (e.g., sampling instruments, winches, boats), or the personal belongings of a sailor.
geology	1. The scientific study of the origin, structure, and composition of the Earth 2. The geological features of a district or country.
geothermal	Heat (thermal) generated within the interior of Earth (geo). Geysers are periodic bursts of hot water and steam at the surface of Earth. Geysers result when underground water comes into contact with a heat source, such as hot rocks near a volcanic source. Geysers indicate geothermal activity.
glycogen	A polysaccharide consisting of glucose units: the form in which carbohydrate is stored in animals.
government	The executive policy-making body of a political unit, community etc.
growth	The process or act of growing.
Gulf stream	A relatively warm ocean current flowing northeastwards from the Gulf of Mexico towards NW Europe. (North Atlantic Drift)