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CIDE DICTIONARY
naphthoquinone | naphthyl | naphthylamine | napier | napier's bones | napier's rods | napierian | napierian logarithm | napiform | napkin | napkin ring

napier's rods

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CIDE DICTIONARY

napier'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 logarithms, for facilitating the operations of multiplication and division.  [1913 Webster]

For further exploring for "napier's rods" in Webster Dictionary Online


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