Napierian a. : Alt. of Naperian

Example:
What are Napierian logarithms?

Taxonomy
Napierian logarithm, logarithm, free encyclopedia, the natural logarithm, search, plot, values, quotient, linear function, identities, relation, Personal tools, common logarithm, Interaction, Toolbox, non-profit organization, John Napier, mathematics-related.

Defination from the web:
Napierian logarithm, or Naperian logarithm, is often used to mean the natural logarithm, but as first defined by John Napier, it is a ... A plot of the Napierian logarithm for values between 0 and 108. (Being a quotient of logarithms, the base of the logarithm chosen is irrelevant. ...