AM stands for ante-meridiem and PM stands for post-meridiem
post meridiem: being after noon
A centimetre is greater than a picometre - if that is what the abbreviations stand for.
12 pm, 1 pm, 2 pm, 3 pm, 4 pm, 5 pm, 6 pm, 7 pm, 8 pm. 8 hours.
pm
110 minutes before 7 pm is 5:10 pm.
post meridian
post meridium
Post Morning
It stands for post meridiem which means "after midday" in Latin
PM stands for Personal Message. In Twitter this is a direct message.
Post Meridian
Prime Meridian
antemeridiem and postmeridiem
petite medium
Prime Minister
Prime Minister?
Plus-minus