Standard Lemma guide

equilateral

adj · noun · 8 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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  • rhymes with -ætəɹəl
  • US: Recorded audio is listed in the source snapshot.

1

adj

Meaning 1

Having all the sides equal.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Topics: geometry, mathematics, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

adj

Meaning 2

Having all the faces equal.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Topics: geometry, mathematics, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

adj

Meaning 3

Having the two sides equal, as a surface divisible by a longitudinal median line into two halves of the same form.

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

4

adj

Meaning 4

Having all the convolutions of the shell in one plane, chiefly of foraminifers.

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

5

noun

Meaning 5

A side exactly corresponding, or equal, to others.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

6

noun

Meaning 6

A figure having all its sides equal.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

7

adjective satellite

Meaning 7

having all sides or faces equal

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

8

noun

Meaning 8

a figure whose sides are all equal

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: figure

History

Etymology

Etymology tree Proto-Italic *aikwos Latin aiquos Latin aequus Latin aequi-der. English equi- English lateral English equilateral From equi- + lateral.

Across languages

Translations

29 source translations are retained for this English entry.

  • Afrikaans: ewesydig — referring to a polygon all of whose sides are of equal length
  • Albanian: barabrinjës — referring to a polygon all of whose sides are of equal length
  • Armenian: հավասարակողմ (havasarakoġm) — referring to a polygon all of whose sides are of equal length
  • Azerbaijani: bərabərtərəfli — referring to a polygon all of whose sides are of equal length
  • Belarusian: роўнабо́чны (rownabóčny) — referring to a polygon all of whose sides are of equal length
  • Bulgarian: равностра́нен (ravnostránen) — referring to a polygon all of whose sides are of equal length
  • Catalan: equilàter — referring to a polygon all of whose sides are of equal length
  • Chinese Mandarin: 等邊的 /等边的 — referring to a polygon all of whose sides are of equal length
  • Czech: rovnostranný — referring to a polygon all of whose sides are of equal length
  • Dutch: gelijkzijdig — referring to a polygon all of whose sides are of equal length
  • Finnish: tasasivuinen — referring to a polygon all of whose sides are of equal length
  • French: équilatéral — referring to a polygon all of whose sides are of equal length
  • German: gleichseitig — referring to a polygon all of whose sides are of equal length
  • Greek: ισόπλευρος (isóplevros) — referring to a polygon all of whose sides are of equal length
  • Ancient Greek: ἰσόπλευρος (isópleuros) — referring to a polygon all of whose sides are of equal length
  • Hebrew: שווה צלעות — referring to a polygon all of whose sides are of equal length
  • Hungarian: egyenlőoldalú — referring to a polygon all of whose sides are of equal length
  • Ido: equilatera — referring to a polygon all of whose sides are of equal length
  • Italian: equilatero — referring to a polygon all of whose sides are of equal length
  • Lithuanian: lygiakraštis — referring to a polygon all of whose sides are of equal length
  • Manx: co-lhiatteeagh — referring to a polygon all of whose sides are of equal length
  • Manx: co-lystagh — referring to a polygon all of whose sides are of equal length
  • Polish: równoboczny — referring to a polygon all of whose sides are of equal length
  • Portuguese: equilátero — referring to a polygon all of whose sides are of equal length
  • Russian: равносторо́нний (ravnostorónnij) — referring to a polygon all of whose sides are of equal length
  • Spanish: equilátero — referring to a polygon all of whose sides are of equal length
  • Tagalog: parigilid — referring to a polygon all of whose sides are of equal length
  • Ukrainian: рівносторо́нній (rivnostorónnij) — referring to a polygon all of whose sides are of equal length
  • Ukrainian: рівнобі́чний (rivnobíčnyj) — referring to a polygon all of whose sides are of equal length
Real reading context

equilateral in complete knowledge articles