Definition of slide rule
: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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slide rule
noun
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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
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: 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
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Britannica.com: Encyclopedia article about slide rule
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