1. A quadratic equation.

2. The algebra of quadratic equations. Quadratic equation, an equation in which the unknown quantity is raised to its second power.

3. Involving a square.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• quaadratics,
• quadrat,
• quadradic,
• quadratice,
• 1uadratic,
• 2uadratic,
• wuadratic,
• auadratic,
• qyadratic,
• quadratix,
• quardratic,
• quadratric,
• qudratic,
• quadatic,
• qaudratic,
• quardatic,
• quadartic,
• quadratik,
• quadric,
• Quadritrix

• quadrature,
• quadratics,
• quadrate.

The adjective form of the word "quadratic" is "quadratic".

The plural form of the word "quadratic" is "quadratics"

The singular form of the word "quadratic" is "quadratic".