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.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

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]
Farlex Partner Medical Dictionary © Farlex 2012

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.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

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]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

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.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann