Phrase guide

planetary gear

noun · 2 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

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

No pronunciation record was provided for this word.

1

noun

Meaning 1

A system of gears that has a central gear wheel (sun gear) around which others (planet gears) rotate, often within an outer ring.

Definition source: English Wiktionary via Wiktextract

Examples

  • Meronyms: sun gear, planet gear

Meaning relationships

Synonyms: epicyclic gear

Antonyms: none provided

Broader terms: gear, part, component

2

noun

Meaning 2

an outer gear that revolves about a central sun gear of an epicyclic train

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: epicyclic gear, planet wheel, planet gear

Antonyms: none provided

Broader terms: gear, gear wheel, geared wheel, cogwheel

History

Etymology

No etymology was provided for this word.

Across languages

Translations

6 source translations are retained for this English entry.

  • Dutch: planetair tandwielstelsel — system of gears
  • Dutch: planeetwielmechanisme — system of gears
  • Finnish: planeettapyörästö — system of gears
  • French: train épicycloïdal — system of gears
  • French: train planétaire — system of gears
  • Polish: przekładnia obiegowa — system of gears