Quadratic Equation

Quadratic Equation, an equation involving the square of the unknown quantity.

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)

Quadrant * Quadriga
Pyrrhus
Pythagoras
Pythagoreans
Pytheas
Pythian Games
Python
Pythoness
Pyx
Quadragesima
Quadrant
Quadratic Equation
Quadriga
Quadrilateral, The
Quadroon
Quadruple Alliance
Quæstors
Quaigh
Quain, Jones
Quain, Richard
Quain, Sir Richard
Quair