biquadratic

B3I1Q10U1A1D2R1A1T1I1C3

adjective

Of a polynomial expression, involving only the zeroth, second, and fourth powers of a variable, as x⁴ + 3x² + 2. Sometimes extended to any expression involving the biquadrate or fourth power (but no higher powers), as x⁴ − 4x³ + 3x² − x + 1.

Similar
biquadratequarticfourth powerbiquadratic equationbiquadratic polynomialquartic polynomial
OriginEnglish quadratic ← French quadratique ← Latin bi- →
Scrabble 25
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Meanings

adjectivebiquadratic (not comparable)
  1. not comparablemathematicsOf a polynomial expression, involving only the zeroth, second, and fourth powers of a variable, as x⁴ + 3x² + 2. Sometimes extended to any expression involving the biquadrate or fourth power (but no higher powers), as x⁴ − 4x³ + 3x² − x + 1.
nounbiquadratic (plural biquadratics)

plural biquadratics

  1. mathematicsA biquadratic equation.

Synonyms & antonyms

nounan algebraic equation or function of the fourth degree

Similar
biquadratequarticfourth power
Broader
number

nounan equation of the fourth degree

Similar
biquadratic equation
Broader
equation

nouna polynomial of the fourth degree

Similar
biquadratic polynomialquartic polynomial
Broader
polynomialmultinomial
Also see
biquadratequartic

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

  1. Proto-Indo-European*dwóh₁
  2. Proto-Indo-European*dwi-
  3. Proto-Italic*dwi-
  4. Latinbi-
  5. Englishbi-
  6. Frenchquadratique
  7. Englishquadratic
  8. Englishbiquadratic

From bi- + quadratic.

Full word history & related roots →

Translations

Finnish bikvadraattinen
  • bikvadraattinenTranslations
French bicarré
  • bicarréTranslations
Polish bikwadratowy, dwukwadratowy
  • bikwadratowyTranslations
  • dwukwadratowyTranslations
Cite this entry
APA

biquadratic. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/biquadratic

MLA

“biquadratic.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/biquadratic. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “biquadratic,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/biquadratic.

Source: biquadratic on Wiktionary, CC BY-SA 4.0.