# slide rule

- 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.

Show More

## Origin of slide rule^{}

1655–65 for earlier sense; 1875–80 for current sense

Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

## Examples from the Web for slide-rule

### Historical Examples

#### Hoskins, there, he's going to be a slide-rule, jus' you wait and see.

Breaking PointJames E. Gunn

#### Seaton threw down the papers and picked up his slide-rule, a twenty-inch trigonometrical duplex.

Skylark ThreeEdward Elmer Smith

#### I watched him copy the indicated figures, surround them with formulas, and solve mysterious problems with a slide-rule.

#### The slide-rule (see Calculating Machines) is a simple apparatus for the mechanical application of the methods of logarithms.

#### This was a little rocket canister which had just enough poof, the slide-rule boys had said, to stop the rotation of the bird.

The Trouble with TelstarJohn Berryman

## 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

Show More

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

## Word Origin and History for slide-rule

Online Etymology Dictionary, © 2010 Douglas Harper