| PCU | pain control unit; primary care unit; patient care unit; pulmonary care unit |
|---|---|
| RU | radioulnar; rat unit; reading unit; residual urine; resin uptake; resistance unit; retrograde urogra... |
| SU | salicyluric acid; secretory unit; sensation unit; solar urticaria; sorbent unit; spectrophotometric ... |
| ImD50 | immunizing dose sufficient to protect 50% of the animals in a test group |
| ACU | acquired cold urticaria; acute care unit; agar colony-forming unit; ambulatory care unit |