Definition, synonyms and related words
Initialism of electromagnetic pulse. (It is caused by Compton recoil of highly excited electrons.)
"The new emp handbook was distributed to everyone at the morning meeting."
Abbreviation of employee.
Abbreviation of extremely metal-poor. (pertaining to stars with extremely low metallicity)
"Astronomers recently cataloged a new emP star that formed billions of years before the Milky Way's heavy elements were abundant."