- slide rule
__noun__analog computer consisting of a handheld instrument used for rapid calculations; have been replaced by pocket calculators•__Syn__: ↑slipstick•__Hypernyms__: ↑analog computer, ↑analogue computer* * *

*noun***:**an instrument consisting in its simple form of a ruler and a medial slide that are graduated with similar logarithmic scales labeled with the corresponding antilogarithms and used for rapid calculation* * *

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.[1655-65 for earlier sense; 1875-80 for current sense]* * *

**slide rule**nounA calculating device consisting of two logarithmic graduated scales sliding one against the other (also slidˈing-rule)• • •Main Entry: ↑slide* * *

a simple piece of equipment like a*ruler*with a piece in the middle that slides along, used for calculating__Thesaurus:__instruments used in mathematics and geometry_{hyponym}* * *

**slide rule**,a rule with a sliding section in the center, both parts marked with logarithmic scales, used for making rapid mathematical calculations.* * *

__n.__a ruler with a sliding central strip, marked with logarithmic scales and used for making rapid calculations, esp. multiplication and division* * *

__noun__,__pl__**⋯ rules**[__count__]**:**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* * *

a long narrow instrument like a ruler, with a middle part that slides backwards and forwards, used for calculating numbers

*Useful english dictionary.
2012.*