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Definition quadratic

Etymology

From French quadratique (1765), from Latin quadr?tus + -ique (English -ic), form of quadr? (“I make square”), from qu?drus (“square”), ultimately from Proto-Indo-European *k?etwóres (“four”), whence also Latin four.

Adjective

quadratic (not comparable)

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