| RCIA | Richmond Creative Investors Association | 里士满创意投资者协会 |
| RCIA | Retail Clerks International Association | 国际零售店员协会 |
| RCIA | Rite of Christian Initiation of Adults | 成人基督教启蒙仪式 |
| RCIA | Rite of Catholic Initiation for Adults | 成人天主教启蒙仪式 |
| RCIA | Request for Clarity, Information & Assistance | 对于清晰、及信息请求帮助 |
| RCIA | Remote Code Injection API (Application Programming Interface) | 远程代码注入API（应用程序编程接口） |
| RCIA | Rite of Christian Initiation for Adults | 成人基督教启蒙仪式 |
| RCIA | red cell immune adherence | 红细胞免疫粘附 |