zenithal

adjective

ze·​nith·​al ˈzē-nə-thəl 

 Canadian also and British usually  ˈze-nə-,

-ni-

1

: of, relating to, or located at or near the zenith

2

: showing correct directions from the center

a zenithal map

Word History

First Known Use

circa 1731, in the meaning defined at sense 1