Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- abbreviation phase modulation
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun metrology Symbol for the
picometer (picometre ), anSI unit oflength equal to 10−12meters (metres ).
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oroboros commented on the word pm
Pm. Chemical element symbol for Promethium.
December 16, 2007