The Zenith, or Verticall starre , which is the point of the firmament directly ouer a mans head, wheresoeuer he standeth.
P. Jones, translation of A. Meyer, Certaine Instr. Gentlemen ii. 4
1709
A small Prick with the Point of a small Needle, through your proper Zenith Star or Point in the Celestial Planisphere, would make a particular Impression or Mark upon the Place or City in the Terrestrial Planisphere.
G. Keith, Geogr. & Navigation Compleated 10
1817
When zenith-stars were trembling on the wave.
P. B. Shelley, Laon & Cythnavii. xx. 166
1903
This Trafalgar Will..Pitt exalt As zenith-star of England's firmament.
T. Hardy, Dynastsi.v. v
2013
The position of any island can be fixed by identifying its zenith star.
D. Scarr, History of Pacific Islandsii. iii. 31
Originally published as part of the entry for zenith, n. & adj.