PM
PM or pm may refer to:
- Post meridiem (p.m.), the second half of the day on a 12-hour clock
- Prime minister
- Promethium (symbol Pm), a chemical element
- Petametre (Pm), a unit of length (1015 m)
- Picometre (pm), a unit of length (10−12 m)
- Picomolar (pM), a unit of molar concentration
- Particulate matter, very small particles suspended in the air
- Saint Pierre and Miquelon (ISO country code)
- .pm, internet top-level domain for Saint Pierre and Miquelon
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