mesologarithm

English

Etymology

From meso- +‎ logarithm.

Noun

mesologarithm (plural mesologarithms)

1. (mathematics, obsolete) A logarithm of the cosine or cotangent.
   • 1939, Johannes Kepler, translated by Charles Glenn Wallis, Epitome of Copernican Astronomy:

     […] the antilogarithm of the greatest inclination is added to the mesologarithm of the argument, and thus the sum will be the mesologarithm of the argument of the reduction.