noun
: a map projection based on the development of a series of concentric cones placed over a sphere so that each cone is tangent to a different parallel with only that section of each unrolled cone that lies along a common central meridian and forms a strip on both sides of the line of tangency being utilized, all parallels being arcs of nonconcentric circles, and the meridians other than the central meridian being curved lines drawn through the true divisions of the parallels