| ISIS | image selected in vivo spectroscopy; imaging science and information system; information system-imag... |
|---|---|
| SIM | selected ion monitoring; Society of Industrial Microbiology |
| SMB | selected mucosal biopsy; standard mineral base |
| EI | Edmonton injector; electrolyte imbalance; electron impact; electron ionization; emotionally impaired... |
| E/M | electron microscope, electron microscopy; evaluation and management |