Zenith sector

Zenith sector
Zenith e"nith (?; 277), n. [OE. senyth, OF. cenith, F. z['e]nith, Sp. zenit, cenit, abbrev. fr. Ar. samt-urras way of the head, vertical place; samt way, path + al the + ras head. Cf. {Azimuth}.] [1913 Webster] 1. That point in the visible celestial hemisphere which is vertical to the spectator; the point of the heavens directly overhead; -- opposed to {nadir}. [1913 Webster]

From morn To noon he fell, from noon to dewy eve, A summer's day; and with the setting sun Dropped from the zenith, like a falling star. --Milton. [1913 Webster]

2. hence, figuratively, the point of culmination; the greatest height; the height of success or prosperity. [1913 Webster]

I find my zenith doth depend upon A most auspicious star. --Shak. [1913 Webster]

This dead of midnight is the noon of thought, And wisdom mounts her zenith with the stars. --Mrs. Barbauld. [1913 Webster]

It was during those civil troubles . . . this aspiring family reached the zenith. --Macaulay. [1913 Webster]

{Zenith distance}. (Astron.) See under {Distance}.

{Zenith sector}. (Astron.) See {Sector}, 3.

{Zenith telescope} (Geodesy), a telescope specially designed for determining the latitude by means of any two stars which pass the meridian about the same time, and at nearly equal distances from the zenith, but on opposite sides of it. It turns both on a vertical and a horizontal axis, is provided with a graduated vertical semicircle, and a level for setting it to a given zenith distance, and with a micrometer for measuring the difference of the zenith distances of the two stars. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

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  • zenith sector — noun Formerly, any of several instruments used for measuring zenith distances • • • Main Entry: ↑zenith …   Useful english dictionary

  • Zenith — e nith (?; 277), n. [OE. senyth, OF. cenith, F. z[ e]nith, Sp. zenit, cenit, abbrev. fr. Ar. samt urras way of the head, vertical place; samt way, path + al the + ras head. Cf. {Azimuth}.] [1913 Webster] 1. That point in the visible celestial… …   The Collaborative International Dictionary of English

  • Zenith distance — Zenith e nith (?; 277), n. [OE. senyth, OF. cenith, F. z[ e]nith, Sp. zenit, cenit, abbrev. fr. Ar. samt urras way of the head, vertical place; samt way, path + al the + ras head. Cf. {Azimuth}.] [1913 Webster] 1. That point in the visible… …   The Collaborative International Dictionary of English

  • Zenith telescope — Zenith e nith (?; 277), n. [OE. senyth, OF. cenith, F. z[ e]nith, Sp. zenit, cenit, abbrev. fr. Ar. samt urras way of the head, vertical place; samt way, path + al the + ras head. Cf. {Azimuth}.] [1913 Webster] 1. That point in the visible… …   The Collaborative International Dictionary of English

  • Sector — Sec tor, n. [L., properly, a cutter, fr. secare, sectum, to cut: cf. F. secteur. See {Section}.] 1. (Geom.) A part of a circle comprehended between two radii and the included arc. [1913 Webster] 2. A mathematical instrument, consisting of two… …   The Collaborative International Dictionary of English

  • Sector of a sphere — Sector Sec tor, n. [L., properly, a cutter, fr. secare, sectum, to cut: cf. F. secteur. See {Section}.] 1. (Geom.) A part of a circle comprehended between two radii and the included arc. [1913 Webster] 2. A mathematical instrument, consisting of… …   The Collaborative International Dictionary of English

  • Dip sector — Sector Sec tor, n. [L., properly, a cutter, fr. secare, sectum, to cut: cf. F. secteur. See {Section}.] 1. (Geom.) A part of a circle comprehended between two radii and the included arc. [1913 Webster] 2. A mathematical instrument, consisting of… …   The Collaborative International Dictionary of English

  • Spherical sector — Sector Sec tor, n. [L., properly, a cutter, fr. secare, sectum, to cut: cf. F. secteur. See {Section}.] 1. (Geom.) A part of a circle comprehended between two radii and the included arc. [1913 Webster] 2. A mathematical instrument, consisting of… …   The Collaborative International Dictionary of English

  • Schiehallion experiment — Schiehallion s isolated position and symmetrical shape lent well to the experiment The Schiehallion experiment was an 18th century experiment to determine the mean density of the Earth. Funded by a grant from the …   Wikipedia

  • Telescopio cenital — Telescopio cenital, construído por Hermann Wanschaff, Berlín Un telescopio cenital es un tipo de telescopio que está diseñado para apuntar hacia arriba en o cerca del cenit. Se utilizan para la medición de precisión de posiciones de estrellas,… …   Wikipedia Español

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