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  • Chambers's Twentieth Century Dictionary
    • Zenith-sector an instrument for measuring zenith-distances
    • ***


Chambers's Twentieth Century Dictionary
Fr., through Sp. zenit, from Ar. samt, short for samt-ur-ras, lit. 'way of the head.'


In science:

Since Snowmass96, the Super-Kamiokande experiment, with its zenith-angle measurement of the atmospheric neutrino signal, has produced the clearest evidence to date for a non-trivial neutrino sector [105].
Particle Astrophysics and Cosmology: Cosmic Laboratories for New Physics (Summary of the Snowmass 2001 P4 Working Group)