| Acronym | Definition |
|---|
| Circ | Circulation |
| Circ | Circle |
| Circ | Circumference |
| Circ | Circular |
| Circ | Circuit |
| Circ | Circumcision |
| Circ | Circumstance |
| Circ | China Insurance Regulatory Commission |
| Circ | Cross Interleave Reed Solomon Code |
| Circ | Computer Incident Response Center |
| Circ | Centre International de Recherche sur le Cancer (French: International Agency for Cancer Research) |
| Circ | Civitan International Research Center (University of Alabama at Birmingham) |
| Circ | Código do Imposto Sobre o Rendimento das Pessoas Colectivas (Portuguese income tax code) |
| Circ | Climate Impacts Research Centre |
| Circ | Circular Reference |
| Circ | Community Information Resource Center |
| Circ | Cooperative Integrated Reading and Composition |
| Circ | Cross Interleave Reed-Solomon Code (used on CDs) |
| Circ | Computer Incident Response Capability |
| Circ | Collectif d'Information et de Recherche Cannabique |
| Circ | Cornell Institute for Research on Children |
| Circ | Central Illinois Robotics Club |
| Circ | Community Informatics Resource Center |
| Circ | Chemical Incident Reports Center |
| Circ | Curtin Indigenous Research Centre |
| Circ | Circumcision Information Resource Centre (Montreal, Canada) |
| Circ | Corporate & Industrial Restructuring Corporation (Pakistan) |
| Circ | Community Information and Referral Centre |
| Circ | Computer Integrated Road Construction |
| Circ | Canada's Information Resource Centre |
| Circ | Central India Regional Council |
| Circ | Central Information Reference and Control |
| Circ | Conflict of Interest in Research Committee |
| Circ | Commercial-Industrial Realty Council |
| Circ | Childcare Information Reference Collection |
| Circ | Career Information Resource Centre |
| Circ | Cultural Industries Research Centre |
| Circ | Circularization Burn (NASA) |
| Circ | Central de Información de Riesgo Crediticio (Spanish: Central Credit Risk Information; Bolivia) |
| Circ | Cytokeratin-Positive Interstitial Reticulum Cell |
| Circ | Computer Information and Resource Center (now defunct GWU division) |
| Circ | Central Incident Response Center |
| Circ | Centralized Information Reference and Control |
| Circ | Colorado Immigration Rights Coalition |