neper

[ nee-per, ney- ]

noun

, Physics.

1. the unit used to express the ratio of two amplitudes as a natural logarithm: equal to 8.68 dB. : Np

neper

/ ˈneɪpə; ˈniː- /

noun

1. a unit expressing the ratio of two quantities, esp amplitudes in telecommunications, equal to the natural logarithm of the ratio of the two quantities NpN

Word History and Origins

Origin of neper¹

First recorded in 1920–25; after J. Neper; John Napier

Word History and Origins

Origin of neper¹

C20: named after John Napier ; the name was approved in 1928

Example Sentences

After reading the laudatory sentences bestowed upon the inventor of logarithms, it is very amusing to find J. A. remarking of Sir Thomas Urquhart, that "the praise he hath beene pleased to confer on the learned and honourable Neper, doth, without any diminution, in every jot as duly belong unto himselfe."

From Project Gutenberg

Main's discography overflows with references to science, astronomy and astrophysics in particular, with songs and albums featuring titles like "Firmament", "Spectra Decay", "Rotary Eclipse" and "Valency," but their Hz project was perhaps the most overtly in thrall to the scientific world. was released as a series of six EPs titled, in order, Corona, Terminus, Maser, Haloform, Kaon and Neper.

From Scientific American

NEPER.—Though still nearer the limb, this walled-plain, 74 miles in diameter, is a much more conspicuous object.

From Project Gutenberg

And therefore it seemeth that this Northeast sea is maintained by the riuer Ob, and such like freshets, as Mare Goticum, and Mare Mediterraneum, in the vppermost parts thereof by the riuers Nilus, Danubius, Neper, Tanais, &c.

From Project Gutenberg

Next vnto it in fame is Tanais, which they call Don, and the third Boristhenes which at this day they call Neper.

From Project Gutenberg