protractor


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.
Related to protractor: selenium

protractor

1. an instrument for measuring or drawing angles on paper, usually a flat semicircular transparent plastic sheet graduated in degrees
2. a surgical instrument for removing a bullet from the body
3. Anatomy a former term for extensor

Protractor

 

an instrument used to construct and measure angles in sketches and on charts. A protractor consists of a straightedge and a semicircle that is graduated in degrees from 0° to 180°. The precision of a protractor increases as its size becomes larger: the larger the semicircle, the smaller the value of a division. Protractors for very precise construction and measurement of angles—for example, in navigation—are equipped with a transparent straightedge and a goniometric vernier that rotates about the midpoint of the diameter of the semicircle.

protractor

[′prō‚trak·tər]
(engineering)
A semicircular instrument used to construct and measure angles formed by intersecting lines of a plane; the midpoint of the diameter of the semicircle is marked and serves as the vertex of angles constructed or measured.

protractor

An instrument graduated in angular degrees for measuring or laying out angles.

protractor

protractorclick for a larger image
A navigational instrument for measuring angles (headings, tracks, and bearings) on a map or a chart.
References in periodicals archive ?
If you must mark your IP on the protractors, do it only on the back of the prottracttor.
The AccuAngle(TM) color protractor was designed by DuPont color researchers and is molded in DuPont(TM) Delrin(R) acetal resin at the company's engineering plastics laboratory in Troy, Mich.
Have a partner line up the protractor with the edge of the cardboard to record the incline at which the snowpack begins to slide.
Holding the protractor at your desired angle, look up the straight edge of the protractor.
A bench-top optical device that uses projection screen image coupled with a protractor device to obtain the reading, the contact angle meter allows more than one person to observe the droplet and read the measurements, according to the company.
At this point, students can either freehand parallel lines or use a protractor or a right triangle.
She also exchanged the protractor and ruler for scissors and paper.
This model is a benchtop optical device that uses projection screen image coupled with a protractor device to obtain the reading.
OR - Optionally, a durable plastic circular protractor and tenths of an inch and millimeters ruler for another $2.
Using the $250,000 electron microscope and a 25-cent protractor, two of the lab's scientists discovered a structural difference between the ivory of modern Asian and African elephants (banned) and that of prehistoric mastodons and mammoths (legal).
Among the tools taken during the incident was an 18v Stanley drill, a sliding protractor and an Argos circular saw.
Creating Circular Art is a hands-on, how-to DVD guide to creating art based on drawing circles with a protractor.