Definition of: quadratic

(kwod·rat′ik) adjective
1. Pertaining to or resembling a square.
2. Relating to a quadratic equation.
—noun Math.
1. An equation of the second degree. It is a pure, simple, or incomplete quadratic when it contains only the second power of the variable, as ax² + c = O; a complete or adfected quadratic when it contains also the first power, as ax² + bx + c = O.
2. A formula, x , for computing the roots of the standard quadratic equation, ax² + bx + c = O.
3. plural The part of algebra that treats of quadratic equations.