zenithal[ zee-nuh-thuh l or, esp. British, zen-uh- ]SEE DEFINITION OF zenithal
EXAMPLES FROM THE WEB FOR ZENITHAL
It is obvious that all perspective projections are zenithal.
All round the horizon is built a black cloud-wall, but the zenithal heaven is clear.
It is clear that perspective and zenithal projections are particular groups of conical projections.
Of the above 25 projections, 23 are conical or quasi-conical, if zenithal and perspective projections be included.