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slide rule

noun

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

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First Known Use of slide rule

1663

SLIDE RULE Defined for English Language Learners

slide rule

noun

Definition of slide rule for English Language Learners

  • : 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

Learn More about slide rule

  1. Britannica.com: Encyclopedia article about slide rule

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