We don't have synonyms for spheroconic yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are spherocytic.
(adj) :
(malacology, of a shell or fossil) Having a coiled shell approaching a sphere in shape.
(n) :
(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.
(adj) :
(malacology, of a shell or fossil) Having a coiled shell approaching a sphere in shape.
(n) :
(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.