DgammaDspot

Etymology
From the mathematical formula $$\frac{\partial \Gamma}{\partial S}$$, the partial derivative of gamma (&Gamma;) with respect to spot price (S), pronounced as "D gamma (by) D spot (price)".

Noun

 * 1)  A third-order measure of derivative price sensitivity, expressed as the rate of change of gamma with respect to changes in the underlying asset price.