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sector

[sek-ter] /ˈsɛk tər/
noun
1.
Geometry. a plane figure bounded by two radii and the included arc of a circle.
2.
a mathematical instrument consisting of two flat rulers hinged together at one end and bearing various scales.
3.
Machinery. a device used in connection with an index plate, consisting of two arms rotating about the center of the plate and set to indicate the angle through which the work is indexed.
4.
Military. a designated defense area, usually in a combat zone, within which a particular military unit operates and for which it is responsible.
5.
Astronomy. an instrument shaped like a sector of a circle, having a variable central angle and sights along the two straight sides, for measuring the angular distance between two celestial bodies.
6.
a distinct part, especially of society or of a nation's economy:
the housing sector; the educational sector.
7.
a section or zone, as of a city.
8.
Computers. a portion of a larger block of storage, as 1/128 of a track or disk.
verb (used with object)
9.
to divide into sectors.
Origin
1560-1570
1560-70; < Late Latin: sector, Latin: cutter, equivalent to of sec(āre) to cut + -tor -tor
Related forms
sectoral, adjective
subsector, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for sectoral
  • One task is to chair some sectoral councils, for instance of agriculture ministers.
  • But other measures, such as sectoral differences in stock returns, suggest that the downturn's impacts were historically uneven.
  • Its labour market policies aren't up to handling sectoral shifts or millions of people in long-term unemployment.
  • Sudden surges in oil prices could trigger large global output losses, redistribution, and sectoral shifts.
  • To better capture sectoral impacts and implications of climate policies, other models are used.
  • They represent public-private initiatives directed at building sectoral strengths using a collaborative framework.
  • Develop sectoral policies on water related to public health and agriculture.
  • sectoral indicators are used to differentiate the potential for energy saving among the provinces.
British Dictionary definitions for sectoral

sector

/ˈsɛktə/
noun
1.
a part or subdivision, esp of a society or an economy: the private sector
2.
(geometry) either portion of a circle included between two radii and an arc. Area: 1/2r²θ, where r is the radius and θ is the central angle subtended by the arc (in radians)
3.
a measuring instrument consisting of two graduated arms hinged at one end
4.
a part or subdivision of an area of military operations
5.
(computing) the smallest addressable portion of the track on a magnetic tape, disk, or drum store
Derived Forms
sectoral, adjective
Word Origin
C16: from Late Latin: sector, from Latin: a cutter, from secāre to cut
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for sectoral

sector

n.

1560s, "section of a circle between two radii," from Late Latin sector "section of a circle," in classical Latin "a cutter, one who cuts," from sectus, past participle of secare "to cut" (see section (n.)). Translated Greek tomeus in Latin editions of Archimedes. Meaning "area, division" appeared 1920, generalized from military sense (1916) of "part of a front," based on a circle centered on a headquarters. As a verb from 1884. Related: Sectoral; sectorial.

Online Etymology Dictionary, © 2010 Douglas Harper
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sectoral in Science
sector
  (sěk'tər)   
The part of a circle bounded by two radii and the arc between them.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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