slide rule
noun
Definition of slide rule
: a manual device used for calculation that consists in its simple form of a ruler and a movable middle piece which are graduated with similar logarithmic scales
Explore Merriam-Webster
First Known Use of slide rule
1663
SLIDE RULE Defined for English Language Learners
slide rule
noun
Definition of slide rule for English Language Learners
-
: 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
Learn More about slide rule
-
Britannica.com: Encyclopedia article about slide rule
Seen and Heard
What made you want to look up slide rule? Please tell us where you read or heard it (including the quote, if possible).
Writing? Check your grammar now!