
1) Angle measurer 2) Angle plotter 3) Angling gear 4) Dimensional instrument 5) Drafting instrument 6) Math device
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https://www.crosswordclues.com/clue/protractor

A protractor is a rectangular, square, circular or semicircular measuring instrument, typically made of transparent plastic or glass, for measuring angles. Most protractors measure angles in degrees (°). Radian-scale protractors measure angles in radians. They are used for a variety of mechanical and engineering-related applications, but perhaps ...
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http://en.wikipedia.org/wiki/Protractor

• (n.) A mathematical instrument for laying down and measuring angles on paper, used in drawing or in plotting. It is of various forms, semicircular, rectangular, or circular. • (n.) One who, or that which, protracts, or causes protraction. • (n.) A muscle which extends an organ or part; -- opposed to retractor. • (n.) An adjust...
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http://thinkexist.com/dictionary/meaning/protractor/

any of a group of instruments used to construct and measure plane angles. The simplest protractor comprises a semicircular disk graduated in ... [2 related articles]
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http://www.britannica.com/eb/a-z/p/124

A navigation tool for measuring angles.
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http://www.diy-wood-boat.com/Boating-terms.html

An instrument, in the form of a graduated semi-circle, which is used to plot and measure angles.
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http://www.encyclo.co.uk/local/20471

1. One who, or that which, protracts, or causes protraction. ... 2. A mathematical instrument for laying down and measuring angles on paper, used in drawing or in plotting. It is of various forms, semicircular, rectangular, or circular. ... 3. <surgery> An instrument formerly used in extracting foreign or offensive matter from a wound. ... 4....
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http://www.encyclo.co.uk/local/20973

(pro-trak´tәr) a muscle that pulls a part forward; see also retractor. a semicircular device for measuring and constructing angles.
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http://www.encyclo.co.uk/local/21001
Pro·tract'or noun 1. One who, or that which, protracts, or causes protraction.
2. A mathematical instrument for laying down and measuring angles on paper, used in drawing or in plotting. It is of various forms, semicircular, rectangular, or circular.
3. (Surg.) An instr...
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http://www.encyclo.co.uk/webster/P/182

Type: Term Pronunciation: prō-trak′tŏr, -tōr Definitions: 1. A muscle drawing a part forward, as antagonistic to a retractor (the serratus anterior muscle is a protractor of the scapula; the lateral pterygoid muscle is a protractor of the mandible).
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http://www.medilexicon.com/medicaldictionary.php?t=73183

A protractor is a mathematical instrument for laying down and measuring angles on paper.
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http://www.probertencyclopaedia.com/browse/GP.HTM

[
n] - drafting instrument used to draw or measure angles
Found on
http://www.webdictionary.co.uk/definition.php?query=protractor
noun drafting instrument used to draw or measure angles
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https://www.encyclo.co.uk/local/20974

Instrument used to measure a flat angle
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https://www.encyclo.co.uk/local/21221

a person or thing that protracts. · (in surveying, mathematics, etc.) an instrument having a graduated arc for plotting or measuring angles. · a muscle that causes a part to protrude.
Found on
https://www.infoplease.com/dictionary/protractor

A semi-circle device used for measuring angles. The edge of a protractor is subdivided into degrees.
Found on
https://www.thoughtco.com/glossary-of-mathematics-definitions-4070804
No exact match found.