The Collaborative International Dictionary
Spheroconic
Spheroconic \Sphe`ro*con"ic\, n. (Geom.) A nonplane curve formed by the intersection of the surface of an oblique cone with the surface of a sphere whose center is at the vertex of the cone.
Wiktionary
spheroconic
n. (context geometry English) A non-plane curve formed by the intersection of the surface of an oblique cone with the surface of a sphere centred at the cone's vertex.