autotransformer.
A transformer with a single winding, its output being taken from taps.
Meaning & usage
A transformer with a single winding, its output being taken from taps.
Where this word comes from
Etymology tree English auto- Proto-Indo-European *terh₂-der. Proto-Indo-European *térh₂t Proto-Indo-European *-ónts Proto-Indo-European *tr̥h₂ónts Proto-Indo-European *tr̥h₂n̥ts Proto-Italic *trāns Proto-Italic *trāns- Latin trāns- Ancient Greek μορφή (morphḗ)der.? Latin fōrma Latin fōrmō Latin transformo Old French transformer Middle French transfourmerbor. Middle English transformen English transform Proto-Indo-European *-yósder. Proto-Italic *-āzios Latin -āriusnom. Latin -āriusbor. Proto-Germanic *-ārijaz Proto-West Germanic *-ārī Old English -ere Middle English -ere English -er English transformer English autotransformer From auto- + transformer.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.