Geodynamo is a term that only has a few synonymous terms that are related to the scientific phenomenon of Earth's magnetic field. One of the most common terms that scientists use is the Earth's magnetic dynamo. This term describes the internal magnetic field of the Earth that is generated by the motion of molten iron and nickel in the planet's outer core. Another synonymous term used in the scientific community is terrestrial dynamo, which refers to the process of magnetic field generation on Earth. Although there may be other descriptions for this phenomenon that could be similar, these terms are specifically used to describe Earth's magnetic field generation process.