follow Dictionary.com

Capitol vs. capital? What's the difference?

parallel rulers

plural noun
1.
a pair of straightedges connected by two pivoted crosspieces of equal length so as to be parallel at all times, used for various navigational purposes, especially for transferring the bearing of a plotted course to a compass rose.
Origin of parallel rulers
1695-1705
1695-1705
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
Cite This Source
Examples from the Web for parallel rulers
Historical Examples
  • Field's parallel rulers are made in two forms, one rolling and the other sliding.

    Nautical Charts G. R. Putnam
  • I pricked that place off on the chart with my dividers, and with my parallel rulers found that west-by-south was the true course.

  • It is just as accurate, too, if you lay the distances off carefully with the dividers and parallel rulers.

    Lectures in Navigation Ernest Gallaudet Draper
  • Captain Ponsberry said no more, but threw down his parallel rulers and his pencil.

    At the Fall of Port Arthur Edward Stratemeyer
  • The parallel rulers need no explanation except for the way in which they are used on a chart.

    Lectures in Navigation Ernest Gallaudet Draper

Word of the Day

Difficulty index for parallel rulers

Few English speakers likely know this word

Word Value for parallel

10
14
Scrabble Words With Friends