| Abbreviation | Definition |
|---|---|
| RCIA | Rite of Christian Initiation for Adults |
| RCIA | Rite of Christian Initiation of Adults |
| RCIC | Rite of Christian Imitation of Children |
| RCIC | Rite of Christian Initiation for Children |
| RCIC | Rite of Christian Initiation of Children |
| RCIT | Rite of Christian Initiation for Teens |
| RCJ | Reformed Church in Japan |
| RCJ | Reformed Church of Jesus |
| RCLS | Rochester Central Lutheran School |
| RCM | Resource Christian Music |
| RCMA | Redlands Christian Migrant Association |
| RCMA | Religious Conference Management Association |
| RCNS | Riverbend Christian Nursery School |
| RCO | Regional Church Office |
| RCPM | Roman Catholic Prison Ministry |
| RCPR | Rutgers Center for the Philosophy of Religion |
| RCRC | Redlands Christian Reformed Church |
| RCS | Redwood Christian Schools |
| RCS | Rochester Catholic Schools |
| RCSC | Roman Catholic Syrian Christian |