Definition of Napier's rods in English:

Napier's rods

noun

Mathematics
  • Napier's bones.

Origin

Late 17th century; earliest use found in Edward Phillips (b. 1630), writer and biographer. From the genitive of the name of John Napier + the plural of rod.

Pronunciation

Napier's rods

/ˌneɪpɪəz ˈrɒdz/