n. (from
Latin media, fem. of
medius "mid-" +
nox "night")
Latin term for
midnight; twelve o'clock midnight (12:00AM);
zero hours and zero
mintues (0:00).
Though mostly obsolete in the United States, it remains, in certain other countries, one of the
scientific diurnal designations used in
nautical travel,
aerial travel, and inland
celestial navigation.