R.I.P. doesn't mean Rest In peace, but "requiescat in pace", which in Latin means "let him (this person) rest in peace". That the 2 phrases have the same acronym is just a lucky coincidence.
Rest in Peace
The abbreviation for after midday is PM. This is an abbreviation of the Latin phrase post meridiem meaning 'after noon'.AM is an abbreviation of the Latin ante meridiem meaning 'before noon'.I take Latin and these answers are correct.
The Latin is et cetera meaning to "continue on". Etc. is the abbreviation.
i.e. It stands for the Latin expression "id est."
That is = id est Abbreviation = i. e.
The abbreviation for "before noon" is "AM." It is the abbreviation for the Latin phrase ante meridian which means "before the high point (of the sun)"Similarly, "PM" is the abbreviation for the Latin post meridian, meaning "after the high point"
I believe you mean qid, which is a Latin abbreviation meaning "four times a day".
element abbreviation Ag comes from the Latin word "argentum", meaning silver.
SPQR is the Latin abbreviation for the phrase Senatus Populusque Romanus, meaning the Senate and Roman People.
Christian. Latin abbreviation of Anno Domini, meaning After Christ.
It is an abbreviation for a Latin phrase meaning "id est", meaning "that is". (source: yahoo answers).
The abbreviation lb comes from the Latin word libra, meaning scales or balances which also described a Roman unit similar to the pound.