Sector: nm (word coming from the Latin sector “cutter”, then term of geometry, from secare “to cut”).
The word “sector” has many meanings:
I) Portion, subdivision:
1. Mathematics: Angular sector.
Circular sector: angular sector cutting out part of a disc.
Spherical sector: portion of the volume of a sphere bounded by a solid angle.
Computer: Part of a track on a computer memory disc that can contain a block of information.
A disk ...
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