from the GNU version of the Collaborative International Dictionary of English
- adj. 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.
from The Century Dictionary and Cyclopedia
- In astronomy, passing the meridian at nearly the same time and on nearly the same parallel of declination as the moon.
Sorry, no etymologies found.