noun · 1 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
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/ˌd͡ʒiːə(ʊ)ˈdʌɪnəməʊ/
/d͡ʒɪəˈdʌɪnəməʊ/
1
noun
Meaning 1
the mechanism responsible for the generation of the Earth's magnetic field caused by convection and conduction currents in the fluid core
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
History
Etymology
Etymology tree Pre-Greek der. Proto-Hellenic *gayader. Ancient Greek γαῖᾰ (gaîă)clip. Ancient Greek γῆ (gê) Ancient Greek -ο- (-o-) Ancient Greek γεω- (geō-)der. English geo- English dynamo English geodynamo From geo- + dynamo.
Across languages
Translations
2 source translations are retained for this English entry.