Fm
Fm , proper noun
the symbol for the element Fermium.
FM , noun
[Frequency Modulaiton.]
A method of transmitting radio signals by modulating the frequency of the carrier wave; -- opposed to AM (amplitude modulation), in which the signal modulates the amplitude, rather than the frequency of the carrier wave. [acron.]
Fm , proper noun
The chemical symbol for Fermium, a transuranic element.