conocuneus

from The Century Dictionary.

• noun A geometrical solid having one curved and three plane faces, one of which is the quadrant of a circle and has as one edge a line equal and parallel to one of the radii of the circle forming a boundary of the quadrant.
• noun A surface generated by a right line which constantly crosses a fixed right line at right angles, and also constantly intersects the circumference of a fixed circle.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun mathematics A conical wedge; a conoid