Napier's bones
noun Date: circa 1658 a set of graduated rods (as of wood or bone) invented by John Napier and used for multiplication and division based on the principles of logarithms

New Collegiate Dictionary. 2001.

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  • Napier's bones — Na pi*er s bones , Napier s rods Na pi*er s rods A set of rods, made of bone or other material, each divided into nine spaces, and containing the numbers of a column of the multiplication table; a contrivance of Baron Napier, the inventor of… …   The Collaborative International Dictionary of English

  • Napier's bones — Computing devices in Rabdology Napier s bones Promptuary …   Wikipedia

  • Napier's bones — Math. a form of multiplication table originally marked on sticks of bone or ivory that could be rearranged to carry out the operations of multiplication or division. Also called Napier s rods. [1650 60; after their developer, J. NAPIER] * * * …   Universalium

  • Napier's bones — noun a set of graduated rods formerly used to do multiplication and division by a method invented by John Napier • Syn: ↑Napier s rods • Usage Domain: ↑plural, ↑plural form • Hypernyms: ↑calculator, ↑calculating machine …   Useful english dictionary

  • Napier's bones — noun A set of numbered rods used for multiplication and division (see the Wikipedia article for a fuller explanation) …   Wiktionary

  • Napier's bones — plural noun Mathematics slips of ivory or other material divided into sections marked with digits, formerly used to facilitate multiplication and division …   English new terms dictionary

  • Napier's rods — Napier s bones Na pi*er s bones , Napier s rods Na pi*er s rods A set of rods, made of bone or other material, each divided into nine spaces, and containing the numbers of a column of the multiplication table; a contrivance of Baron Napier, the… …   The Collaborative International Dictionary of English

  • Napier's rods — noun a set of graduated rods formerly used to do multiplication and division by a method invented by John Napier • Syn: ↑Napier s bones • Usage Domain: ↑plural, ↑plural form • Hypernyms: ↑calculator, ↑calculating machine …   Useful english dictionary

  • Napier's rods — noun Another name for Napier’s bones …   Wiktionary

  • Na|pier's bones — or Na|pier s rods «NAY pee uhrz», a device for multiplying and dividing, consisting of narrow pieces of wood or other material which are separated into compartments marked with certain digits. It was invented by the Scottish mathematician John… …   Useful english dictionary

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