napier's rods
Definition
Noun: * Napier's rods: A historical calculating tool consisting of a set of numbered rods or bones, used for performing multiplication and division. The device was invented by the Scottish mathematician John Napier in the early 17th century.
Usage
- The term is used historically to refer to the specific physical calculating device invented by John Napier. It is a proper noun phrase.
- Example: "Before the invention of mechanical calculators, mathematicians sometimes used Napier's rods to simplify complex multiplication."
Advanced Usage
- The device is also known as "Napier's bones." The two terms are historically interchangeable.
- Example: "The museum's exhibit on the history of computation features a replica of Napier's rods, demonstrating how 17th-century scholars performed calculations."
Variants and Related Words
- Napier's bones (noun phrase): An alternative name for the same calculating device.
- Slide rule (noun): A later, more advanced analog calculating device that also used logarithmic scales, partly inspired by Napier's work.
Synonyms
- Calculating rods
- Napier's bones
Notes on Meaning
- The term refers exclusively to the historical artifact. It is not used in modern computing or mathematics outside of a historical context. The invention was a significant step in the development of computational aids leading to the slide rule and, eventually, mechanical calculators.
Noun
-
a set of graduated rods formerly used to do multiplication and division by a method invented by John Napier
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