slide rule
noun
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
Words nearby slide rule
slide guitar,
slide knot,
slide mountain,
slide over,
slide rest,
slide rule,
slide show,
slide trombone,
slide valve,
slide-action,
slidell
British Dictionary definitions for slide rule
slide rule
noun obsolete
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