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What (who) is protractor$64854$ - definition
ANGLE MEASURING INSTRUMENT
Bevel protractor; Protracter; Protractors; Protracters
![A 400 gon protractor marked in [[gradian]]s.](https://commons.wikimedia.org/wiki/Special:FilePath/Grad protractor.png?width=200 "A 400 gon protractor marked in [[gradian]]s.")
![A "[[Cras navigation plotter]]" double-protractor, in foreground, named after his inventor [[Jean Cras]].](https://commons.wikimedia.org/wiki/Special:FilePath/Navigational rules types.JPG?width=200 "A \"[[Cras navigation plotter]]\" double-protractor, in foreground, named after his inventor [[Jean Cras]].")
![[[Geodreieck]]}}, a special type of [[protractor triangle]] (180°).](https://commons.wikimedia.org/wiki/Special:FilePath/Set square Geodreieck.svg?width=200 "[[Geodreieck]]}}, a special type of [[protractor triangle]] (180°).")
Protractor
·noun An adjustable pattern used by tailors.
II. Protractor ·noun One who, or that which, protracts, or causes protraction.
III. Protractor ·noun A muscle which extends an organ or part;
- opposed to retractor.
IV. Protractor ·noun An instrument formerly used in extracting foreign or offensive matter from a wound.
V. Protractor ·noun 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.
protractor
¦ noun
1. an instrument for measuring angles, typically in the form of a flat semicircle marked with degrees along the curved edge.
2. chiefly Zoology a muscle serving to extend a part of the body. Compare with retractor.
protractor
(protractors)
A protractor is a flat, semi-circular piece of plastic or metal which is used for measuring angles.
N-COUNT
Wikipedia
Protractor
A protractor is a measuring instrument, typically made of transparent plastic or glass, for measuring angles.
Some protractors are simple half-discs or full circles. More advanced protractors, such as the bevel protractor, have one or two swinging arms, which can be used to help measure the angle.
