What does A.M. and P.M. stand for??=D?

Question

Of course I know that A.M. is in the morning, and P.M. is past afternoon, I'm just curious what they stand for^^

Answer 1

A.M.  

1762, abbreviation of Latin - ante meridiem "before noon."

P.M.  

abbreviation of Latin - post meridiem "after noon" (1647).

Answer 2

A.M. and P.M. stands for A.M = Amplitude Modulation P.M. = Phase Modulation

It is just easier to say A.M = After Midnight. P.M. = Past Midday

Answer 3

both are latin.

ante meridian means before the middle (or noon) and post meridian meas after the middle (after noon) =)

Answer 4

"AM” stands for the Latin phrase Ante Meridiem —which means “before noon”—and “PM” stands for  Post  Meridiem   which means “after noon.” :]