| NR | do not repeat [Lat. non repetatur]; nerve root; neural retina; neutral red; noise reduction; nonreac... |
|---|---|
| NR | Reynold's number |
| NSA | Neurological Society of America; normal serum albumin; no salt added; no significant abnormality; no... |
| NUI | number user identification |
| numc | number concentration |
| linking number | A property of a long biopolymer (such as duplex DNA) equal to the number of twists (related to the frequency of turns around the central axis of the helix) plus the writhing number. (05 Mar 2000) |
|---|---|
| Loschmidt's number | The number of molecules in 1 cm3 of ideal gas at 0캜 and 1 atmosphere of pressure; Avogadro's number divided by 22,414 (i.e., 2.6868 × 1019 cm-3). (05 Mar 2000) |