Definition from Wiktionary, the free dictionary
STM (plural STMs)
- (microscopy) Initialism of Scanning Tunneling Microscope.
- (publishing industry) Scientific, technical, and medicine
- (train control) Initialism of Specific Transmission Module.
- (transport) Société de transport de Montréal — the MTC – the transit corporation for the island and megacity of Montreal; in 2002 it replaced the STCUM.