# ∂

(Redirected from Rounded d)
The character (html element: &#8706; or &part;, unicode: U+2202) or $\partial$ is a stylized d mainly used as a mathematical symbol to denote a partial derivative such as $\frac{\partial z}{\partial x}$ (read as "the partial derivative of z with respect to x"). The symbol was originally introduced by Legendre in 1786, but only gained popularity when it was used by Jacobi in 1841.[1]