Meaning of QUADRATIC in English

QUADRATIC

/ kwɒˈdrætɪk; NAmE kwɑːˈd-/ adjective

( mathematics ) involving an unknown quantity that is multiplied by itself once only :

a quadratic equation

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WORD ORIGIN

mid 17th cent.: from French quadratique or modern Latin quadraticus , from quadratus made square, past participle of quadrare , from quattuor four.

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.