protractor


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protractor

 [pro-trak´ter]
1. a muscle that pulls a part forward; see also retractor.
2. a semicircular device for measuring and constructing angles.

pro·trac·tor

(prō-trak'tŏr, -tōr),
A muscle drawing a part forward, as antagonistic to a retractor (for example, the serratus anterior muscle is a protractor of the scapula; the lateral pterygoid muscle is a protractor of the mandible).
[L. pro-traho, pp. -tractus, to draw forth]

protractor

(prō-trăk′tər, prə-)
n.
1. A semicircular instrument for measuring and constructing angles.
2. Anatomy A muscle that extends a limb or other part.

pro·trac·tor

(prō-trak'tǒr)
A muscle drawing a part forward, as antagonistic to a retractor.
[L. pro-traho, pp. -tractus, to draw forth]

protractor 

1. Instrument used to measure or set out angles on paper.
2. A scale containing a circle graduated in degrees and a set of axes emerging from the centre of the circle used to set the axis of an astigmatic ophthalmic lens. It also includes various other scales for positioning the optical centre of lenses.
References in periodicals archive ?
Next, let students move the protractor C and measure [angle]ACB until they make their conjectures (Figure 13).
We have had problems with units marking or engraving the PRO 360 and PRO 3600 digital protractors (NSN 5210-01-494-0899 and NSN 5210-01-418-0671).
Star performance Protractor, a Galileo half-brother to the smart Danehill Destiny, scored on his debut and is one to keep an eye on Results and analysis start page 102
Think of the Al as a protractor and treat zero pitch and 10-degrees nose low as your scale limits.
These include the 0.8-millimeter Maxum gel pen in a metallic multipack that comes in such ink colors as blue, red, pink, purple, green, bronze, gold and silver; Geo tools that include 30 sheets of 8.5- by 11-inch quadrille graph paper as well as a shatterproof ring binder ruler and a 6-inch 180-degree protractor; and a wedge-shape, pink beveled eraser.
* protractor for measuring angles to draw triangles
She's doing geometry and using a protractor in math and she understands it all," says Shayer.
In Britain and countries influenced by the British system of education, a tin box full of mathematical instruments (straight edge, square, compass, protractor) is part of a student's standard kit.
"Whether it is learning to add fractions so that they can laminate small pieces of wood together to achieve a desired thickness or learning how to use a protractor to cut the correct angle on a piece of wood, the lessons add up throughout the year to give the students an edge on the [state standardized] test."
The new protractor eyepiece measures 360[degrees] to an accuracy of 5' using a rotary vernier and rotatable crosshair.
For contractor Mike Kilpatrick, the ProSite Protractor from Starrett means finishing jobs taster and making clients happier.