drafting instrument

Noun
  1. An instrument used by a draftsman in making drawings (synset 103235863)
    is a type of: instrument - a device that requires skill for proper use
    subtypes:
    • compass - drafting instrument used for drawing circles
    • divider - a drafting instrument resembling a compass that is used for dividing lines into equal segments or for transferring measurements
    • protractor - drafting instrument used to draw or measure angles
    • triangle - any of various triangular drafting instruments used to draw straight lines at specified angles
    • t-square - a square used by draftsmen to draw parallel lines

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