geodynamo
noun/ˌd͡ʒiːə(ʊ)ˈdʌɪnəməʊ/ · /d͡ʒɪəˈdʌɪnəməʊ/
Etymology From geo- + dynamo.
1
the mechanism responsible for the generation of the Earth's magnetic field caused by convection and conduction currents in the fluid core
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.