Answer: NEPER

AnswerCrossword Clue
NEPERPhysics ratio unit
NEPERMathematician Napier a.k.a. ...
NEPERLogarithm word
NEPERPhysics ratio
NEPERLogarithmic unit
NEPERFather of logarithms
NEPERLogarithm unit
neperan electrical ratio unit
neperthe unit used to express the ratio of two amplitudes as a natural logarithm: equal to 8.68 dB