| nem | nutritional milk unit [Ger. Nahrungs Einheit Milch] |
|---|---|
| NK | Commission on [Anatomical] Nomenclature [Ger. Nomenklatur Kommission]; natural killer [cell]; neurok... |
| PBE | tuberculin from Mycobacterium tuberculosis bovis [Ger. Perlsucht Bacillen-emulsion] |
| PTO | Klemperer's tuberculin [Ger. Perlsucht Tuberculin Original] |
| QRZ | wheal reaction time [Ger. Qaddel Reaktion Zeit] |