Definition of "EM"
EM
noun
countable and uncountable, plural EMs
(biology, countable) Initialism of Effective Microorganism.
(energy) Initialism of Energy Management.
(countable) Abbreviation of electron microscope.
(uncountable) Abbreviation of electron microscopy.
(uncountable) Initialism of electromagnetism.
(criminal justice) Initialism of electronic monitoring.
(business) Initialism of emerging market.
adjective
not comparable