zenithal

from WordNet (r) 3.0 (2006)
zenithal
    adj 1: relating to or located at or near the zenith
    
from The Collaborative International Dictionary of English v.0.48
Zenithal \Ze"nith*al\, a.
   Of or pertaining to the zenith. "The deep zenithal blue."
   --Tyndall.
   [1913 Webster]
    

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