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neper

American  
[nee-per, ney-] / ˈni pər, ˈneɪ- /
Also napier

noun

Physics.

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

neper British  
/ ˈneɪpə, ˈniː- /

noun

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

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of neper

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

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.