polyconic
/ˌpɒlɪˈkɒnɪk/Chiefly Cartography
adjective
Involving or based upon a number of cones; specifically designating a system of map projection in which each parallel of latitude is represented by developing a cone tangent to the earth's surface along that parallel.
noun
A polyconic projection.
Origin
Mid 19th century. From poly- + conic. Compare biconic.