logarithm [logarithms](The power to which a given base number must be raised in order to obtain a given number) noun [UK: ˈlɒ.ɡə.rɪ.ðəm] [US: ˈlɑː.ɡə.ˌrɪ.ðəm]
естествен логаритъмnoun {m}
natural logarithm [natural logarithms](logarithm in base e) noun [UK: ˈnæt.ʃrəl ˈlɒ.ɡə.rɪ.ðəm] [US: ˈnæ.tʃə.rəl ˈlɑː.ɡə.ˌrɪ.ðəm]