Napier''s Bones :: Napier's bones () Alt. of Napier's rod.

Napier''s Rods :: 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..

Napierian :: Napierian (a.) Alt. of Naperia.

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