| Acronym | Definition |
|---|
| RCMB | Red Cedar Message Board (Michigan State Spartan message board) |
| RCMB | Respiratory Cell and Molecular Biology |
| RCMB | Racing Club Marillais Bouzillé (French soccer club) |
| RCMB | Roquebrune Cap Martin Basket (French women's basketball team) |
| RCMB | Royal Club des Magiciens de Bruxelles (French: Royal Club of Magicians of Brussels; Belgium) |
| RCMB | Robertson's Cooked-Meat Broth (microbiology) |
| RCMB | Research in Computational Molecular Biology (ACM Conference) |
| RCMB | Rugby Club Montceau Bourgogne (French rugby club) |
| RCMB | Rugby Club Montaigut Besse (French rugby club) |
| RCMB | Royal Canadian Mounted Breaks (radio show) |