3 ผลลัพธ์ สำหรับ -napier\'s rods-
หรือค้นหา: -napier\'s rods-, *napier\'s rods*, napier\'s rod
เนื่องจากผลลัพธ์มีน้อย ระบบจึงเปลี่ยนคำค้นเป็น *napier\'s rod*

Collaborative International Dictionary (GCIDE)
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 ]

Variants: Napier's bones

WordNet (3.0)
napier's bones(n) a set of graduated rods formerly used to do multiplication and division by a method invented by John Napier, Syn. Napier's rods

Collaborative International Dictionary (GCIDE)
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 ]

Variants: Napier's bones

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