Napier's bones

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noun Na·pi·er's bones \ˈnā-pē-ərz-\

Definition of Napier's bones

  1. :  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

1646

First Known Use of napier's bones

1646


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contemplative of or relative to the past

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