Source : Webster's Revised Unabridged Dictionary (1913)

Moon-culminating \Moon"-cul"mi*na`ting\, a.
   Culminating, or coming to the meredian, at or about the same
   time with the moon; -- said of a star or stars, esp. of
   certain stars selected beforehand, and named in an ephemeris
   (as the Nautical Almanac), as suitable to be observed in
   connection with the moon at culmination, for determining
   terrestrial longitude.