i think it is latin u know like AD: ano dominie
AM and PM, in English, mean "before noon" and "after noon", respectively. The abbreviations AM and PM come from Latin words, ante meridiem (which translates to before midday) for AM, post meridiem (which translates to after midday) for PM.
AM and PM are abbreviations for ante meridiem and post meridiem mean before noon and after noon post meridiem or post meridian.
You should only use abbreviations if everyone knows what they mean - like USA or am/pm. You need to write out numbers from one to ten, also, instead of using 1 - 10.
A centimetre is greater than a picometre - if that is what the abbreviations stand for.
ATS
Abbreviations
distal
what does DOM mean
AM is an abbreviation of the Latin ante meridiem. The Latin word meridies means noon or midday.PM is an abbreviation for post meridiem.An easy way to remember the two abbreviations is: AM = After Midnight; PM = Prior to Midnight, or Pre-Midnight.During World War One the British Army Corps of Signals converted the abbreviations AM and PM to Ack Emma and Pip Emma as part of their military communications alphabet, or 'spelling alphabet'.
most home plans using abbreviations (to keep the plan from being cluttered) will have a table that explains the abbreviations
It depends on what you mean by a "group of abbreviations". If you mean several abbreviations chained together to form something that looks like a word (like SCUBA and RADAR), it's an Acronym. If you mean something like an alphabetical listing of abbreviations, that's usually called a glossary (although that particular term covers a lot of ground...)
They are acronyms. A.M. (Latin ante meridiem, "before noon") and P.M. (Latin post meridiem, "after noon")