protractor

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English[edit]

A semicircular protractor.
A circular protractor.

Etymology[edit]

protract +‎ -or.

Pronunciation[edit]

  • IPA(key): /pɹəˈtɹæktə(ɹ)/
    • (file)
  • Rhymes: -æktə(ɹ)

Noun[edit]

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[edit]

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

Translations[edit]

References[edit]

  1. ^ 1874, Edward H. Knight, American Mechanical Dictionary