| PC | avoirdupois weight [Lat. pondus civile]; packed cells; paper chromatography; paracortex; parent cell... |
|---|---|
| H&L | heart and lung [machine] |
| MARC | machine-readable cataloging; multifocal and recurrent choroidopathy |
| MRAB | machine-readable archives in biomedicine |
| MRI | machine-readable identifier; magnetic resonance imaging; medical records information; Medical Resear... |