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slide rule

noun

Simple Definition of slide rule

  • : an old-fashioned instrument that is like a ruler with a middle piece that slides back and forth and that is used to do calculations

Source: Merriam-Webster's Learner's Dictionary

Full Definition of slide rule

  1. :  a manual device used for calculation that consists in its simple form of a ruler and a movable middle piece which are graduated with similar logarithmic scales

1663

First Known Use of slide rule

1663


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