| S/D | sharp/dull; systolic/diastolic |
|---|---|
| SE | early systolic wave |
| SEM | sample evaluation method; scanning electron microscopy; secondary enrichment medium; standard error ... |
| SEP | self-evaluation process; sensory-evoked potential; septum; somatosensory evoked potential; sperm ent... |
| SER | sebum excretion rate; sensitizer enhancement ratio; sensory evoked response; service; smooth endopla... |