There's no common abbreviation for 'diem'. The Latin word is a masculine gender noun that sometimes may be feminine. It's in the singular form of the accusative case, as the direct object of the verb. In the common phrase 'per diem', which means 'by the day', an abbreviation may be 'p.d.'.
Ter In Diem: that is, "three times a day".
The abbreviation for "once daily" is qd. I believe the Latin is quo diem.
The plural of "diem" is "dies."
Ryan Diem's birth name is Ryan E. Diem.
Do Hoang Diem was born in 1963.
Diem was assassinated in 1963 (the same year that Kennedy was assassinated).
Ryan Diem is 6' 6".
Diem Lien was born in 1971.
Carl Diem died in 1962.
Per diem means by the day. Carpe diem means seize the day. Did you have a different meaning in mind?
diem was captured and assassinated
Diem Brown goes by Di.