- geologyThe science that studies the structure of the Earth (or other planets), together with its origin and development, especially by examination of its rocks.
- geostrophicRelating to the balance, in the atmosphere, between the horizontal Coriolis forces and the horizontal pressure forces.
- geo-earth
- geosminA bacterial derivative of decahydronaphthalene that has a strong earthy smell and is the material responsible for petrichor and for the earthy taste of beetroot.