The Collaborative International Dictionary
Zenithal \Ze"nith*al\, a.
Of or pertaining to the zenith. ``The deep zenithal blue.''
--Tyndall.
Wiktionary
a. 1 Of or pertaining to a zenith 2 (context cartography of a projection English) azimuthal
WordNet
adj. relating to or located at or near the zenith
Usage examples of "zenithal".
I also chose a very zenithal type of lighting, and a very charged atmosphere.
Unable to account for this, in a mounting excitement he stared more intently than ever, and was suddenly seized by the unnatural idea that he was peering downward into a vast, vertiginous abyss, rather than toward the zenithal heavens.
He made the rounds with his snuffers, and resorted at last to his cosy living-room, leaving the shop lit only through a skylight-by the far-off gleam of four crucial conjunct planets wheeling downward from the zenithal line.