protractor

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English

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A semicircular protractor.
A circular protractor.

Etymology

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protract +‎ -or.

Pronunciation

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Noun

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protractor (plural protractors)

  1. One who, or that which, protracts, or causes protraction.
  2. A circular or semicircular tool for drawing or measuring angles.
  3. (surgery) An instrument formerly used in extracting foreign or offensive matter from a wound.
  4. (anatomy) A muscle that extends an organ or part; opposed to retractor.
  5. An adjustable pattern used by tailors.[1]

Synonyms

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  • (measuring tool): semicircle (for semicircular shape)

Hypernyms

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Translations

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References

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  1. ^ Edward H[enry] Knight (1877) “Protractor”, in Knight’s American Mechanical Dictionary. [], volumes II (GAS–REA), New York, N.Y.: Hurd and Houghton [], →OCLC.