Phrase guide

quadratic equation

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

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1

noun

Meaning 1

A polynomial equation of the second degree; an equation that can be rearranged in standard form as ax2+bx+c=0, where x is an unknown value, a, b, and c are known numbers, and where a does not equal zero.

Definition source: English Wiktionary via Wiktextract

Topics: algebra, mathematics, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

an equation in which the highest power of an unknown quantity is a square

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: quadratic

Antonyms: none provided

Broader terms: equation

History

Etymology

No etymology was provided for this word.

Across languages

Translations

31 source translations are retained for this English entry.

  • Armenian: քառակուսի հավասարում (kʻaṙakusi havasarum) — second-degree equation
  • Catalan: equació quadràtica — second-degree equation
  • Chinese Mandarin: 二次方程 (èr-cì fāngchéng) — second-degree equation
  • Czech: kvadratická rovnice — second-degree equation
  • Danish: andengradsligning — second-degree equation
  • Dutch: tweedegraadsvergelijking — second-degree equation
  • Dutch: vierkantsvergelijking — second-degree equation
  • Finnish: toisen asteen yhtälö — second-degree equation
  • French: équation du second degré — second-degree equation
  • German: quadratische Gleichung — second-degree equation
  • Greenlandic: andengradsligningi — second-degree equation
  • Hindi: द्विघात समीकरण (dvighāt samīkraṇ) — second-degree equation
  • Hungarian: másodfokú egyenlet — second-degree equation
  • Italian: equazione di secondo grado — second-degree equation
  • Italian: equazione quadratica — second-degree equation
  • Japanese: 二次方程式 (niji hōteishiki) — second-degree equation
  • Korean: 이차 방정식 (icha bangjeongsik) — second-degree equation
  • Māori: whārite pūrua — second-degree equation
  • Polish: równanie kwadratowe — second-degree equation
  • Portuguese: equação quadrática — second-degree equation
  • Portuguese: equação do segundo grau — second-degree equation
  • Romanian: ecuație de gradul al doilea — second-degree equation
  • Romanian: ecuație pătratică — second-degree equation
  • Russian: квадра́тное уравне́ние (kvadrátnoje uravnénije) — second-degree equation
  • Spanish: ecuación cuadrática — second-degree equation
  • Spanish: ecuación de segundo grado — second-degree equation
  • Tagalog: dawaking tumbasan — second-degree equation
  • Thai: สมการกําลังสอง — second-degree equation
  • Turkish: ikinci dereceden denklem — second-degree equation
  • Turkish: ikinci derece denklem — second-degree equation
  • Urdu: دو ضربی مساوات (do-zarbī musāvāt) — second-degree equation