spheroconic

== English == === Etymology === From sphero- +‎ conic. === Pronunciation === === Noun === spheroconic (plural spheroconics) (geometry) 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. === Adjective === spheroconic (malacology, of a shell or fossil) Having a coiled shell approaching a sphere in shape. === Further reading === “spheroconic”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.