Standard Lemma guide

isosceles

adj · 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.

  • Received-Pronunciation: /aɪˈsɒsəliːz/
  • General-American: /aɪˈsɑsəliz/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • CMU ARPABET: AY0 S AO1 S AH0 L IY2 Z Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

adj

Meaning 1

Having (at least) two sides of equal length, used especially of a triangle or trapezoid.

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

adjective satellite

Meaning 2

(of a triangle) having two sides of equal length

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

Borrowed from Latin īsoscelēs, from Ancient Greek ἰσοσκελής (isoskelḗs, “equal-legged”), from ἴσος (ísos, “equal”) + σκέλος (skélos, “leg”) + -ής (-ḗs, adjective suffix). See also iso-.

Across languages

Translations

32 source translations are retained for this English entry.

  • Armenian: հավասարասրուն (havasarasrun) — having two sides of equal length, used especially of an isosceles triangle or trapezoid
  • Azerbaijani: bərabəryanlı — having two sides of equal length, used especially of an isosceles triangle or trapezoid
  • Belarusian: раўнабедраны (rawnabjedrany) — having two sides of equal length, used especially of an isosceles triangle or trapezoid
  • Bulgarian: равнобедрен (ravnobedren) — having two sides of equal length, used especially of an isosceles triangle or trapezoid
  • Catalan: isòsceles — having two sides of equal length, used especially of an isosceles triangle or trapezoid
  • Cebuano: duhalid — having two sides of equal length, used especially of an isosceles triangle or trapezoid
  • Chinese Mandarin: 等腰 (děngyāo) — having two sides of equal length, used especially of an isosceles triangle or trapezoid
  • Czech: rovnoramenný — having two sides of equal length, used especially of an isosceles triangle or trapezoid
  • Dutch: gelijkbenig — having two sides of equal length, used especially of an isosceles triangle or trapezoid
  • Finnish: tasakylkinen — having two sides of equal length, used especially of an isosceles triangle or trapezoid
  • French: isocèle — having two sides of equal length, used especially of an isosceles triangle or trapezoid
  • German: gleichschenklig — having two sides of equal length, used especially of an isosceles triangle or trapezoid
  • Ancient Greek: ἰσοσκελής (isoskelḗs) — having two sides of equal length, used especially of an isosceles triangle or trapezoid
  • Hebrew: שווה שוקיים (shvé shokáim) — having two sides of equal length, used especially of an isosceles triangle or trapezoid
  • Hindi: समद्विबाहु (samdvibāhu) — having two sides of equal length, used especially of an isosceles triangle or trapezoid
  • Hungarian: egyenlő szárú — having two sides of equal length, used especially of an isosceles triangle or trapezoid
  • Irish: comhchosach — having two sides of equal length, used especially of an isosceles triangle or trapezoid
  • Italian: isoscele — having two sides of equal length, used especially of an isosceles triangle or trapezoid
  • Italian: equicrure — having two sides of equal length, used especially of an isosceles triangle or trapezoid
  • Latin: īsoscelēs — having two sides of equal length, used especially of an isosceles triangle or trapezoid
  • Lithuanian: lygiašonis — having two sides of equal length, used especially of an isosceles triangle or trapezoid
  • Macedonian: рамнокрак (ramnokrak) — having two sides of equal length, used especially of an isosceles triangle or trapezoid
  • Manx: cochoshanagh — having two sides of equal length, used especially of an isosceles triangle or trapezoid
  • Polish: równoramienny — having two sides of equal length, used especially of an isosceles triangle or trapezoid
  • Portuguese: isósceles — having two sides of equal length, used especially of an isosceles triangle or trapezoid
  • Portuguese: isóscele — having two sides of equal length, used especially of an isosceles triangle or trapezoid
  • Romanian: isoscel — having two sides of equal length, used especially of an isosceles triangle or trapezoid
  • Russian: равнобе́дренный (ravnobédrennyj) — having two sides of equal length, used especially of an isosceles triangle or trapezoid
  • Spanish: isósceles — having two sides of equal length, used especially of an isosceles triangle or trapezoid
  • Swedish: likbent — having two sides of equal length, used especially of an isosceles triangle or trapezoid
  • Tagalog: kaduhain — having two sides of equal length, used especially of an isosceles triangle or trapezoid
  • Welsh: isosgeles — having two sides of equal length, used especially of an isosceles triangle or trapezoid
Real reading context

isosceles in complete knowledge articles