natural logarithm

noun, Mathematics
1.
a logarithm having e as a base. Symbol: ln.
Also called Napierian logarithm.
Compare common logarithm.
Origin
1810-20
British Dictionary definitions for natural logarithms

natural logarithm

noun
1.
a logarithm to the base e. Usually written loge or ln Also called Napierian logarithm Compare e (sense 1), common logarithm
natural logarithms in Science
natural logarithm  
A logarithm using base e. Natural logarithms are common in mathematics, especially in cases involving complex numbers. They are also called Napierian logarithms, after their inventor, English mathematician John Napier (1550-1617). See more at e. Compare common logarithm.