| rDNA | recombinant (or ribosomal) deoxyribonucleic acid |
|---|---|
| RP | radial pulse; radiopharmaceutical; rapid processing [of film]; Raynaud phenomenon; reactive protein;... |
| RPS4Y | ribosomal protein S4, Y-linked |
| rRNA | ribosomal ribonucleic acid |
| rRNP | ribosomal ribonucleoprotein |