| spm | spermatogonial metaphase |
|---|---|
| SPMA | spinal progressive muscular atrophy |
| SPMR | standard proportionate mortality ratio (or rate) |
| SPMSQ | Short Portable Mental Status Questionnaire |
| SPN | senior plan network; sialophorin; solitary pulmonary nodule; supplemental parental nutrition; sympathetic preganglionic neuron |
| SpnCbT | spinocerebellar tract |
| SpO2 | pulse oximetry |
| SPOCS | surgical planning and orientation computer system |
| SPOD | spouse's perception of disease |
| spon, spont | spontaneous |