| Term | Definition / Meaning / Stand for |
| RGD |
Arginine-Glycine-Aspartic Acid |
| RLR |
RIG-I-Like Receptor |
| RPO |
RNA Polymerase |
| RDR |
RNA-Dependent RNA Polymerase |
| RFT |
Radio Frequency Transducer |
| RNG |
Random Gene |
| RVD |
Random Variability Detection |
| RDP |
Rapid Determination of Proteins |
| RRS |
Rapid Response System |
| RAF |
Rapidly Accelerated Fibrosarcoma |
| RHEB |
Ras Homolog Enriched in Brain |
| RHK |
Ras Homolog Kinase |
| RKC |
Ras Kinase Complex |
| RIT1 |
Ras-Like Protein with Intestinal Expression |
| RAL |
Ras-Like Protein |
| RAC1 |
Ras-Related C3 Botulinum Toxin Substrate 1 |
| RAC |
Ras-Related C3 Botulinum Toxin Substrate |
| RAB |
Ras-Related Protein |
| RAS |
Rat Sarcoma |
| RLP |
Reactive Lymphoid Proliferation |
| RCR |
Receptor Control Region |
| RIL |
Receptor Interacting Ligand |
| RIP |
Receptor Interacting Protein |
| RCK |
Receptor for Calcium Kinase |
| RHR |
Receptor for Hormones |
| RASP |
Receptor-Activated Serine/Threonine Kinase |
| RGT |
Receptor-Guided Therapy |
| RLR |
Receptor-Like Protein |
| REC |
Recessive Epistasis Compound |
| RE |
Recombinant DNA Experiment |
| RCL |
Recombination Control Region |
| RED |
Reduced Electrophoresis Dye |
| REV |
Regulator of Expression of Virion Protein |
| RCH |
Renal Cell Hyperplasia |
| RCI |
Renal Cell Infiltration |
| RL |
Renal Lysis |
| RSP |
Renal Spheroid Protein |
| RVEC |
Renal Vascular Endothelial Cells |
| REO |
Reovirus |
| RSF |
Replication Factor |
| REP1 |
Replication Protein 1 |
| REP |
Replication Protein |
| RDC |
Reproductive-Developmental Cycle |
| RPT |
Reptilian |
| REF |
Research Evaluation Fund |
| RWS |
Respiratory Water Saturation |
| RLO |
Restriction Fragment Length Option |
| RS |
Reticular Sarcoma |
| REL |
Reticuloendothelial System |
| RCD |
Retinal Cone Degeneration |
| RCS |
Retinal Cone and Rod Degeneration |
| RDS |
Retinal Degeneration Syndrome |
| RNL |
Retinal Nerve Layer |
| RAM |
Retinoic Acid Metabolite |
| RIG-I |
Retinoic Acid-Inducible Gene I |
| RHL |
Retinoid-Hormone-Like |
| RO |
Retinopathy of Prematurity |
| RTA |
Retroviral Transactivation |
| RT |
Reverse Transcription |
| RDE |
Reversibility of DNA Encoded Gene Expression |
| ROCK |
Rho-Associated Coiled-Coil Kinase |
| RHO |
Rhodopsin |
| RUC |
Ribonucleic Uterine Cells |
| RPL |
Ribosomal Protein |
| RRNA |
Ribosomal RNA |
| RIB |
Ribosomal |
| RIF |
Rifampin |
| RV |
Rotavirus |
| RUB |
Rubella Virus |
| RECOMB |
Conference On Computational Molecular Biology |