An ungula is a portion of a solid of revolution obtained by cutting via a plane oblique to its base. The term derives from the Latin word ungula for the hoof of a horse.
Examples include the conical wedge, cylindrical wedge, cylindrical hoof, and spherical wedge.
More things to try:
Weisstein, Eric W. "Ungula." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Ungula.html
