quadratic
English
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Alternative forms
- quadratick (obsolete)
Etymology
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 quartus (“fourth”).
Pronunciation
- IPA(key): /kwɒdˈɹætɪk/, /kwəˈdɹætɪk/
Audio (Southern England) (file)
Adjective
quadratic (not comparable)
- Square-shaped.
- (mathematics) Of a polynomial, involving the second power (square) of a variable but no higher powers, as .
- (mathematics) Of an equation, of the form .
- (mathematics) Of a function, of the form .
Translations
of a class of polynomial of the form y = ax² + bx + c
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Translations
quadratic polynomial
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Usage notes
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”.
Derived terms
Related terms
See also
References
- “quadratique”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012.
Further reading
- “quadratic”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.
- “quadratic”, in The Century Dictionary […], New York, N.Y.: The Century Co., 1911, →OCLC.
- “quadratic”, in OneLook Dictionary Search.
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