Standard Lemma guide

autotransformer

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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1

noun

Meaning 1

A transformer with a single winding, its output being taken from taps.

Definition source: English Wiktionary via Wiktextract

Topics: business, electrical, electrical-engineering, electricity, electromagnetism, energy, engineering, natural-sciences, physical-sciences, physics

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

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.

Across languages

Translations

4 source translations are retained for this English entry.

  • German: Spartransformator — Translations
  • German: Autotransformator — Translations
  • Polish: autotransformator — Translations
  • Russian: автотрансформа́тор (avtotransformátor) — Translations