M / mĕdĭlūnĭus
adjective

mĕdĭlūnĭus

fem. mĕdĭlūnia · neut. mĕdĭlūnium
mediusluna
in the middle of the month, having half a disk, half-orbed
in the middle of the month, having half a disk, half-orbed (post-class): (luna) primo est corniculata, deinde medilunia, Mart. Cap. 7, § 738.