pm

Multiple Entries:
  PM    Pm    p.m.    promethium  

Concise Oxford English Dictionary © 2008 Oxford University Press:
PM/piːˈem/

▶abbreviation

• 1 post-mortem.

• 2 Prime Minister.

• 3 Provost Marshal.

Concise Oxford English Dictionary © 2008 Oxford University Press:
Pm

▶symbol the chemical element promethium.

Concise Oxford English Dictionary © 2008 Oxford University Press:
p.m./piːˈem/

▶abbreviation after noon.

– origin from L. post meridiem.

Concise Oxford English Dictionary © 2008 Oxford University Press:
promethium /prəˈmiːθɪəm/

▶noun the chemical element of atomic number 61, an unstable radioactive metal of the lanthanide series. (Symbol: Pm)

– origin 1940s: mod. L., from the name of Prometheus (see Promethean).