Definition of polyconic in US English:

polyconic

adjective

Cartography
  • 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

Cartography
  • A polyconic projection.

Origin

Mid 19th century. From poly- + conic. Compare biconic.

Pronunciation

polyconic

/ˌpɒlɪˈkɒnɪk/