| Acronym | Definition |
|---|
| RCCI | Reactivity Controlled Compression Ignition (engine combustion) |
| RCCI | Rawalpindi Chamber of Commerce and Industry (Pakistan) |
| RCCI | Riyadh Chamber of Commerce and Industry |
| RCCI | Rural Community College Initiative (Chapel Hill, NC) |
| RCCI | Responsable de la Conformité et du Contrôle Interne (French: Head of Compliance and Internal Control; various organizations) |
| RCCI | Rocketman's Classic Cougar Innovations (Raymond, NH) |
| RCCI | Rocketman's Classic Cougar Innovations, LLC (Goldthwaite, TX) |
| RCCI | Regional Computer Crime Investigator |
| RCCI | Rod Cooke Construction, Inc. (est. 1993; Mobile, AL) |
| RCCI | Reformed Catholic Church International |
| RCCI | Réseaux Régionaux de Contrôle des Infections (French: Regional Infection Control Networks; Canada) |
| RCCI | Recherche de Causes et Circonstances d'Incendie (French: Search for Causes and Circumstances of Fire; fire department training course) |