Webster dictionary was developed by Noah Webster in the beginning of 19th century. On this website, you can find definition for sector from the 1913 edition of Webster's Revised Unabridged Dictionary. Define sector using one of the most comprehensive free online dictionaries on the web.

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sector
Part of Speech: noun
Results: 2
1. A part of a circle comprehended between two radii and the included arc.
2. 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.
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