Standard Lemma guide

cycloid

adj · noun · 7 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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  • /ˈsaɪklɔɪd/
  • Southern-England: Recorded audio is listed in the source snapshot.

1

adj

Meaning 1

Resembling a circle; cycloidal.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

adj

Meaning 2

Thin and rounded, with smooth edges.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Topics: biology, natural-sciences, zoology

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

adj

Meaning 3

characterized by alternating high and low moods.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Topics: human-sciences, medicine, psychoanalysis, psychology, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

The locus of a point on the circumference of a circle that rolls without slipping on a fixed straight line.

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

5

noun

Meaning 5

A fish having cycloid scales.

Definition source: English Wiktionary via Wiktextract

Topics: biology, natural-sciences, zoology

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

6

adjective satellite

Meaning 6

resembling a circle

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: cycloidal

Antonyms: none provided

7

noun

Meaning 7

a line generated by a point on a circle rolling along a straight line

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: roulette, line roulette

Narrower terms: curate cycloid, prolate cycloid

History

Etymology

From cyclo- + -oid.

Across languages

Translations

32 source translations are retained for this English entry.

  • French: cycloïdal — resembling a circle
  • Greek: κυκλοειδής (kykloeidís) — resembling a circle
  • Irish: cioglóideach — resembling a circle
  • Irish: ciorclóideach — resembling a circle
  • Polish: cykloidalny — resembling a circle
  • Portuguese: cicloide — resembling a circle
  • Spanish: cicloidal — resembling a circle
  • Spanish: cicloideo — resembling a circle
  • French: cycloïde — fish scales: thin and rounded
  • Polish: cykloidalny — fish scales: thin and rounded
  • Catalan: cicloide — geometry: locus of a point on the circumference of a rolling circle
  • Czech: cykloida — geometry: locus of a point on the circumference of a rolling circle
  • Dutch: cycloïde — geometry: locus of a point on the circumference of a rolling circle
  • Esperanto: cikloido — geometry: locus of a point on the circumference of a rolling circle
  • Finnish: sykloidi — geometry: locus of a point on the circumference of a rolling circle
  • French: cycloïde — geometry: locus of a point on the circumference of a rolling circle
  • German: Zykloide — geometry: locus of a point on the circumference of a rolling circle
  • German: Radlaufkurve — geometry: locus of a point on the circumference of a rolling circle
  • Greek: κυκλοειδής (kykloeidís) — geometry: locus of a point on the circumference of a rolling circle
  • Hungarian: ciklois — geometry: locus of a point on the circumference of a rolling circle
  • Irish: cioglóideach — geometry: locus of a point on the circumference of a rolling circle
  • Irish: ciorclóideach — geometry: locus of a point on the circumference of a rolling circle
  • Italian: cicloide — geometry: locus of a point on the circumference of a rolling circle
  • Occitan: cicloïde — geometry: locus of a point on the circumference of a rolling circle
  • Polish: cykloida — geometry: locus of a point on the circumference of a rolling circle
  • Portuguese: cicloide — geometry: locus of a point on the circumference of a rolling circle
  • Romanian: cicloidă — geometry: locus of a point on the circumference of a rolling circle
  • Russian: цикло́ида (ciklóida) — geometry: locus of a point on the circumference of a rolling circle
  • Serbo-Croatian: циклои́да — geometry: locus of a point on the circumference of a rolling circle
  • Serbo-Croatian: cikloída — geometry: locus of a point on the circumference of a rolling circle
  • Spanish: cicloide — geometry: locus of a point on the circumference of a rolling circle
  • Polish: cykloida — zoology: fish with cycloid scales