polyconic projection

noun

poly·​con·​ic projection ˌpä-lē-ˈkä-nik- 

: a map projection consisting of a composite series of concentric cones each of which before being unrolled has been placed over a sphere so as to be tangent to a different parallel of latitude

Word History

Etymology

poly- + conic entry 1

First Known Use

circa 1864, in the meaning defined above