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protractor    
n. 分度器,伸肌,傷處異物摘出器

分度器,伸肌,傷處異物摘出器

protractor
n 1: drafting instrument used to draw or measure angles

Protractor \Pro*tract"or\, n.
1. One who, or that which, protracts, or causes protraction.
[1913 Webster]

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.
[1913 Webster]

3. (Surg.) An instrument formerly used in extracting foreign
or offensive matter from a wound.
[1913 Webster]

4. (Anat.) A muscle which extends an organ or part; --
opposed to {retractor}.
[1913 Webster]

5. An adjustable pattern used by tailors. --Knight.
[1913 Webster]

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