Question: What does the Latin Abbreviation A.M. stand for?
Answer: The Latin abbreviation A.M. stands for ante meridiem. Sometimes the abbreviation is lower case: a.m. or without the periods: am. A.M. means before noon and refers to the morning. It starts just after midnight.
The two Latin words, ante and meridiem are a preposition followed by a noun. The preposition ante = 'before.' The online Lewis and Short Latin Dictionary says that meridies comes from medius-dies or 'mid-day' or 'noon.'
