zenith [zeniths](astronomy: point vertically above a position or observer) noun [UK: ˈze.nɪθ] [US: ˈziː.nəθ]The sun is at the zenith. = Il sole è allo zenit.
zenitale adjective
zenithal(of or pertaining to a zenith) adjective [UK: ˈze.nɪ.θəl] [US: ˈze.nɪ.θəl]