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Webster 1913 Edition

Mesologarithm

Mesˊo-log′a-rithm

,

Noun.

[

Meso-

+

logarithm

: cf. F.

mésologarithme

.]

(Math.)

A logarithm of the cosine or cotangent.

[Obs.]

Kepler. Hutton.

Webster 1828 Edition

Mesologarithm

MESOLOG'ARITHM

,

Noun.

[Gr. middle, and logarithm.]

A logarithm of the co-sines and co-tangents.

The former is called by Napier an antilogarithm, the latter a differential.