(definition) by Webster 1913 Wed Dec 22 1999 at 1:22:16

Na"pi*er's bones` (?), 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 logarithms, for facilitating the operations of multiplication and division.

© Webster 1913.

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