a device for performing mathematical calculations, consisting essentially of a ruler having a sliding piece moving along it, both marked with graduated, usually logarithmic, scales: now largely replaced by the electronic calculator.
Origin of slide rule
1655-65 for earlier sense; 1875-80 for current sense
After presiding over years of technological innovations, the inventor himself still prefers the simplicity of a slide rule.
Yet another familiar school-days object may be going the way of the inkwell and the slide rule.
Eventually, old fashioned books will go the way of the buggy whip and the slide rule.
The engineer is often not allowed sufficient time to perform long hydraulics formulas and exacting slide rule calculations.
Determine the relative humidity by reading the chart or slide rule provided with the psychrometer.
Most civil service written tests do not require the use of a calculator or slide rule.
Fortunately, wisdom has not gone the way of your slide rule.
Computations were performed by slide rule and, when luxury afforded it, a desk calculator.
British Dictionary definitions for slide rule
a mechanical calculating device consisting of two strips, one sliding along a central groove in the other, each strip graduated in two or more logarithmic scales of numbers, trigonometric functions, etc. It employs the same principles as logarithm tables