sector
noun
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measuring instrument consisting of two graduated arms hinged at one end
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a particular aspect of life or activity“They were helpless in an important sector of their life.”sphere
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a social group that forms part of the society or the economy“the public sector”
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a portion of a military position
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the minimum track length that can be assigned to store information“unless otherwise specified a sector of data consists of 512 bytes”
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a plane figure bounded by two radii and the included arc of a circle