Standard Lemma guide

epicycle

noun · 5 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.

  • UK: /ˈɛpɪˌsaɪkəl/
  • US: Recorded audio is listed in the source snapshot.

1

noun

Meaning 1

A small circle whose centre is on the circumference of a larger circle; in Ptolemaic astronomy it was seen as the basis of revolution of the "seven planets", given a fixed central Earth.

Definition source: English Wiktionary via Wiktextract

Topics: astronomy, natural-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

Any circle whose circumference rolls around that of another circle, thus creating a hypocycloid or epicycloid.

Definition source: English Wiktionary via Wiktextract

Topics: geometry, mathematics, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

A ring of atoms joining parts of an already cyclic compound

Definition source: English Wiktionary via Wiktextract

Topics: chemistry, natural-sciences, organic-chemistry, physical-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

An ad hoc complication added to a model to make it fit the known data

Definition source: English Wiktionary via Wiktextract

Usage: figuratively

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

noun

Meaning 5

a circle that rolls around (inside or outside) another circle; generates an epicycloid or hypocycloid

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: circle

History

Etymology

From Latin epicyclus, from Ancient Greek ἐπίκυκλος (epíkuklos), from ἐπί (epí, “upon”) + κύκλος (kúklos, “circle”). The ad hoc complication sense is a generalization from the archetype supplied by the Ptolemaic astronomy sense.

Across languages

Translations

39 source translations are retained for this English entry.

  • Arabic: فَلَك التَّدوِير — a small circle whose centre is on the circumference of a larger circle
  • Bulgarian: епицикъл (epicikǎl) — a small circle whose centre is on the circumference of a larger circle
  • Bulgarian: епицикълът (epicikǎlǎt) — a small circle whose centre is on the circumference of a larger circle
  • Catalan: epicicle — a small circle whose centre is on the circumference of a larger circle
  • Chinese Mandarin: 本輪 /本轮 (běnlún) — a small circle whose centre is on the circumference of a larger circle
  • Czech: epicykl — a small circle whose centre is on the circumference of a larger circle
  • Danish: epicykel — a small circle whose centre is on the circumference of a larger circle
  • Dutch: epicykels — a small circle whose centre is on the circumference of a larger circle
  • Finnish: episykli — a small circle whose centre is on the circumference of a larger circle
  • French: épicycle — a small circle whose centre is on the circumference of a larger circle
  • German: Epizykel — a small circle whose centre is on the circumference of a larger circle
  • Ancient Greek: ἐπίκυκλος (epíkuklos) — a small circle whose centre is on the circumference of a larger circle
  • Hebrew: אפיציקל — a small circle whose centre is on the circumference of a larger circle
  • Icelandic: aukahringur — a small circle whose centre is on the circumference of a larger circle
  • Icelandic: hjáhringur — a small circle whose centre is on the circumference of a larger circle
  • Ido: epiciklo — a small circle whose centre is on the circumference of a larger circle
  • Italian: epiciclo — a small circle whose centre is on the circumference of a larger circle
  • Japanese: 周転円 — a small circle whose centre is on the circumference of a larger circle
  • Kabuverdianu: episiklu — a small circle whose centre is on the circumference of a larger circle
  • Kabuverdianu: epiciclo — a small circle whose centre is on the circumference of a larger circle
  • Latin: epicyclus — a small circle whose centre is on the circumference of a larger circle
  • Malayalam: അധിചക്രം (adhicakraṁ) — a small circle whose centre is on the circumference of a larger circle
  • Manx: far-chiarkyl — a small circle whose centre is on the circumference of a larger circle
  • Norwegian: episyklus — a small circle whose centre is on the circumference of a larger circle
  • Persian: تدویر (tadvir) — a small circle whose centre is on the circumference of a larger circle
  • Persian: فلک تدویر (falak-e tadvir) — a small circle whose centre is on the circumference of a larger circle
  • Polish: epicykl — a small circle whose centre is on the circumference of a larger circle
  • Portuguese: epiciclo — a small circle whose centre is on the circumference of a larger circle
  • Russian: эпицикл (epicikl) — a small circle whose centre is on the circumference of a larger circle
  • Sanskrit: वृत्त (vṛtta) — a small circle whose centre is on the circumference of a larger circle
  • Sanskrit: नीचोच्चवृत्त (nīcoccavṛtta) — a small circle whose centre is on the circumference of a larger circle
  • Slovak: epicyklus — a small circle whose centre is on the circumference of a larger circle
  • Spanish: epiciclo — a small circle whose centre is on the circumference of a larger circle
  • Swedish: epicykel — a small circle whose centre is on the circumference of a larger circle
  • Tamil: எபி வட்டம் (epi vaṭṭam) — a small circle whose centre is on the circumference of a larger circle
  • Ukrainian: епіцикл (epicykl) — a small circle whose centre is on the circumference of a larger circle
  • Finnish: episykli — any circle whose circumference rolls around that of another circle
  • Manx: far-chiarkyl — any circle whose circumference rolls around that of another circle
  • Polish: epicykl — any circle whose circumference rolls around that of another circle