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
Full 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
First Known Use of slide rule
Learn More about slide rule
Britannica.com: Encyclopedia article about "slide rule"
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