[ ahn-te-kree-stoo m; English an-tee-kris-tuh m ]
/ ˈɑn tɛˈkri stʊm; English ˈæn tiˈkrɪs təm /
before Christ. Abbreviation: A.C.
What Do A.M. And P.M. Stand For?Most English speakers know that a.m. refers to the hours from midnight and noon, and p.m. to the hours from noon and midnight. But what do these ubiquitous abbreviations stand for? The term we associate with the morning, a.m., is an abbreviation the Latin phrase ante merīdiem meaning “before midday”; p.m. is an abbreviation of post merīdiem, meaning—you guessed it—“after midday.” These two terms help …
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019