Astro*Dictionary by Michael Erlewine
1 article for "Ante Meridiem"
Ante Meridiem [Astro*Index]From the Latin meaning before midday. Commonly abbreviated to AM or a.m. The 12 hours of the day before noon as measured from midnight (0h) of any date.
See also:
♦ Post Meridiem ♦ Time
Astro*Index Copyright © 1997 Michael Erlewine