| TNA | total nutrient admixture |
|---|---|
| TAR | Thrombocytopenia-Absent Radius |
| ESR | Einstein stoke radius; electric skin resistance; electron spin resonance; equipment service report; ... |
| IR | drop of voltage across a resistor produced by a current; ileal resection; immune response; immunizat... |
| Ra | radial; radium; radius |