fm -abbr
- fathom
Fm -symbol
- fermium
FM ['ef-,em] -n
- a broadcasting system using frequency modulation
- a radio receiver of such a system
- field manual
FMN [,ef-,em-'en] -n
- a yellow crystalline phosphoric ester C 17H 21N 4O 9P of riboflavin that is a coenzyme of several flavoprotein enzymes
fMRI -abbr
- functional magnetic resonance imaging