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polynomial degrees
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Alternative forms[edit]


From French quadratique (1765), from Latin quadrātus + -ique[1] (English -ic), form of quadrō ‎(I make square), from quādrus ‎(square), ultimately from Proto-Indo-European *kʷetwóres ‎(four), whence also Latin four.


quadratic ‎(not comparable)

  1. square-shaped
  2. (mathematics) of a polynomial, involving the second power (square) of a variable but no higher powers, as ax^2 + bx + c.
  3. (mathematics) of an equation, of the form  ax^2 + bx + c = 0.
  4. (mathematics) of a function, of the form  y = ax^2 + bx + c .



quadratic ‎(plural quadratics)

  1. (mathematics) A quadratic polynomial, function or equation.

Usage notes[edit]

Not to be confused with quartic ‎(degree four). Both derive ultimately from Proto-Indo-European *kʷetwóres ‎(four), with quadratic coming from “four-sided”, hence “square, two-dimensional, degree two”.

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See also[edit]


  1. ^ quadratique” in le Trésor de la langue française informatisé (The Digitized Treasury of the French Language).

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