discrimiˈnantal, a. Math.
[f. prec. + -al1.]
Relating to a discriminant.
discriminantal index of a singular point of a curve, the number of intersections of the polar of an arbitrary point with the curve at the given point. total discriminantal index of a curve, the sum of the discriminantal indices of all its singular points.
| 1875 Smith Higher Singularities Plane Curves in Proc. Lond. Math. Soc. VI. 154. |