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zenith distance

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noun Astronomy.
  1. the angular distance from the zenith of a point on the celestial sphere to the sphere, measured along a great circle that is perpendicular to the horizon; the complement of the altitude.

Origin of zenith distance

First recorded in 1695–1705
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for zenith distance

Historical Examples

  • The zenith-distance of an object is the angle which the ray of light from it makes with the vertical direction thus defined.

    Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7

    Various