Pm

Symbol, Chemistry.
1.
.
1.
.
1.
Past Master.
2.
.
3.
p.m.
4.
Police Magistrate.
5.
.
6.
post-mortem.
7.
Prime Minister.
8.
Provost Marshal.
1.
after noon.
2.
the period between noon and midnight.
abbreviation
1.
premium
abbreviation
1.
St Pierre and Miquelon
Chemical symbol
1.
promethium
abbreviation
1.
Prime Minister
2.
Past Master (of a fraternity)
3.
Paymaster
4.
Postmaster
5.
(military) Provost Marshal
abbreviation
1.
(indicating the time period from midday to midnight) post meridiem See a.m.
2.
post-mortem (examination)

abbreviation of Latin post meridiem “after noon.”

pm abbr.
picometer

Pm
The symbol for the element promethium.
Pm
The symbol for promethium.
promethium
(prə-mē’thē-əm)
Symbol Pm
A radioactive metallic element of the lanthanide series. Promethium does not occur in nature but is prepared through the fission of uranium. It has 17 isotopes, one of which is used to make long-lived miniature batteries that work at extreme temperatures for up to five years. The longest-lived isotope, Pm 147, has a half-life of 2.5 years and is used as a source of beta rays. Atomic number 61; melting point 1,168°C; boiling point 2,460°C; valence 3. See Periodic Table.

1. preventive maintenance.
2. Presentation Manager
3. [“PM, A System for Polynomial Manipulations”, G.E. Collins, CACM 9(8):578-589 (Aug 1966)].
[Jargon File]

networking
The country code for St. Pierre and Miquelon.
(1999-01-27)
1.
phase modulated
2.
phase modulation
picomolar
promethium
1.
particulate matter
2.
past master
3.
police magistrate
4.
postmaster
5.
postmenopausal
6.
postmistress
7.
postmortem
8.
prime minister
9.
private message
10.
provost marshal
1.
premium
2.
premolar
Latin post meridiem (after noon)
Latin post meridiem (after noon)