This is a simple terminology question. Let $S$ be a (let's say smooth) surface in $\mathbb{R}^3$, and $p$ a point on $S$. Suppose the principle curvatures $\kappa_1$ and $\kappa_2$ at $p$ are both negative. I am imagining $p$ sitting at the bottom of a dent in the surface. Is there an accepted term to describe such a point? The difficulty is that the Gaussian curvature $\kappa_1 \kappa_2$ is positive, so intrinsically $p$ is no different than if it were on a bump rather than a dent. I could make up my own term of course, e.g., valley point or cup point, but I'd rather follow convention.
Thanks!