| N/10 | tenth-normal [solution] |
|---|---|
| N/50 | fiftieth-normal [solution] |
| NKHS | nonketotic hyperosmolar syndrome; normal Krebs-Henseleit solution |
| ORS | olfactory reference syndrome; oral rehydration solution; oral surgery, oral surgeon; Orthopaedic Res... |
| pH-stat | apparatus for maintaining the pH of a solution |