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.

Nearby words

  1. slide guitar,
  2. slide knot,
  3. slide mountain,
  4. slide over,
  5. slide rest,
  6. slide show,
  7. slide trombone,
  8. slide valve,
  9. slide-action,
  10. slide-rule

Origin of slide rule

1655–65 for earlier sense; 1875–80 for current sense Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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
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