cologarithm

noun
co·log·a·rithm | \ (ˌ)kō-ˈlȯ-gə-ˌri-t͟həm , -ˈlä- \

Definition of cologarithm 

: the logarithm of the reciprocal of a number

First Known Use of cologarithm

1881, in the meaning defined above

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Dictionary Entries near cologarithm

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The first known use of cologarithm was in 1881

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