| p | Greek lower case letter pi; the ratio of circumference to diameter, 3.1415926536 |
|---|---|
| RAD | radial artery catheter; radiation absorbed dose; radical; radiography or radiographic; reactive airw... |
| RVEDD | right ventricular end-diastolic diameter |
| TCD | tapetochoroidal dystrophy; T-cell depletion; thermal conductivity detector; tissue culture dose; tra... |
| THD | Thomsen disease; transverse heart diameter |
| FLM | fetal lung maturity |
|---|---|
| FSC | fetal spinal cord |
| FZ | fetal zone |
| HFA | human fetal adrenal |