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Webster 1913 Edition

Protractor

Pro-tract′or

,
Noun.
1.
One who, or that which, protracts, or causes protraction.
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.
3.
(Surg.)
An instrument formerly used in extracting foreign or offensive matter from a wound.
4.
(Anat.)
A muscle which extends an organ or part; – opposed to
retractor
.
5.
An adjustable pattern used by tailors.
Knight.

Webster 1828 Edition

Protractor

PROTRACT'OR

,
Noun.
An instrument for laying down and measuring angles on paper with accuracy and dispatch, and by which the use of the line of chords is superseded. It is of various forms, semicircular, rectangular or circular.

Definition 2024

protractor

protractor

English

A semicircular protractor.
A circular protractor.

Noun

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.
    (Can we find and add a quotation of Knight to this entry?)

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