Glossary

R

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R+ R-R interval R2A media Radar Radial immunodiffusion test Radiation Radiation biology Radiation dose Radioactive Radioactive carbon Radioassay Radioenzymatic assay Radiograph Radiography Radioimmunoassay Radioisotope Radiology Radiometer Radius Raster Readaptation Real-time Recovery Recumbency Recumbent Red blood cell Red blood cell mass Reflectance Regulatory Physiology Relativistic particles REM REM latency Remote sensing Renal Renal clearance Renal physiology Renal stone Renal stone-forming salts Renal system Renal, fluid and electrolyte physiology Renin Reporter gene Reserve Science Activity Residual volume Resolidification Resolution Resorption Respiration Respiratory Respiratory Exchange Ratio Respiratory Quotient Respiratory rate Respiratory syncytial virus Respiratory system Retention Reticulocyte Reticuloendothelial Retina Retinal Retrorockets Retrosternal Revitalization Rhodotorula rubra Rhopalia RNA-ribonucleic acid Rod Roentgen Roentgenography Roentgeonogram Roll Root module Rose bengal agar (RB) Rose bengal medium Rosette stage Rotatores Rubella Rubeola Russian Space Agency