[ 'zɛnɪθ ]
■ noun
1》 the time at which something is most powerful or successful.
2》 the point in the sky directly overhead. The opposite of nadir .
↘the highest point in the sky reached by a given celestial object.
Derivatives
~al adjective
Origin
ME: from OFr. or med. L. cenit , based on Arab. samt (ar-ra's) 'path (over the head)'.