## English

### Etymology

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