SECTOR • E-FREE TRANSLATION.COM • Definition of Sector

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/sˈɛktər/ Listen

noun

Sector n.

(Geom.) A part of a circle comprehended between two radii and the included arc.

A mathematical instrument, consisting of two rulers connected at one end by a joint, each arm marked with several scales, as of equal parts, chords, sines, tangents, etc., one scale of each kind on each arm, and all on lines radiating from the common center of motion. The sector is used for plotting, etc., to any scale.

An astronomical instrument, the limb of which embraces a small portion only of a circle, used for measuring differences of declination too great for the compass of a micrometer. When it is used for measuring zenith distances of stars, it is called a zenith sector.

Dip sector, an instrument used for measuring the dip of the horizon.

Sector of a sphere, or Spherical sector, the solid generated by the revolution of the sector of a circle about one of its radii, or, more rarely, about any straight line drawn in the plane of the sector through its vertex.

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Etymology of 'Sector'

Collaborative International Dictionary of English 0.48

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"Sector" Quotes from Famous Books

... sandbags on top. Here and there was a muddy, bedraggled Tommy half asleep, nursing a dirty and muddy rifle on "sentry go." Everything was very quiet at the moment—no rifles popping, as I had expected, no bullets flying, and, as it happened, absolutely no shelling in the whole sector. ...

— A Yankee in the Trenches • R. Derby Holmes

... outfits sent with the troops quartered in this particular sector was a moving picture machine and many reels of film. But, as Sam Drew had said, the machine ...

— The Moving Picture Boys on the War Front - Or, The Hunt for the Stolen Army Films • Victor Appleton

... upon the roads to St. Omer and the south, and thought of the days last April, when squadron after squadron of French cavalry came riding hot and fast along them to the relief of our hard-pressed troops, after the break of the Portuguese sector of the line at Richebourg St. Vaast. But our way lay north, not south, through a district that seemed strangely familiar to me, though in fact I had only passed forty-eight hours in it, in 1916. Forty-eight hours, however, in the war-zone, at a time of active fighting, and that long before ...

— Fields of Victory • Mrs. Humphry Ward

... at South Georgia were generously ready to share with me their knowledge of the waters in which they pursued their trade, and, while confirming earlier information as to the extreme severity of the ice conditions in this sector of the Antarctic, they were able to give advice ...

— South! • Sir Ernest Shackleton

... a year's service as a camion driver with the French amry in the Chemin-des-Dames sector and a year's service with the A.E.F. as an infantry private on special duty with "The Stars and Stripes," the official A.E.F. newspaper. Most of them were drawn at odd minutes during the French push ...

— "I was there" - with the Yanks in France. • C. LeRoy Baldridge

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