| Acronym | Definition |
|---|
| FMSB | Faculté de Médecine et des Sciences Biomédicales (French: Faculty of Medicine and Biomedical Sciences) |
| FMSB | Fédération des Mutualités Socialistes du Brabant (Federation: Federation of Socialist Mutual of Brabant; Belgium) |
| FMSB | Force Multinationale de Sécurité à Beyrouth (French: Multinational Force Security in Beirut; Beirut, Lebanon) |
| FMSB | Farmers and Merchants State Bank (Iowa) |
| FMSB | Fleet Maintenance Support Branch (US Navy) |
| FMSB | FFM Marketing Sdn. Bhd. (Malaysia) |
| FMSB | Financial Markets Service Bank |