| CAT-S | Children's Apperception Test, Supplemental |
|---|---|
| SMS | senior medical student; serial motor seizures; Shared Medical Systems; Smith-Magenis syndrome; somat... |
| SOS | self-obtained smear; supplemental oxygen system |
| SPN | senior plan network; sialophorin; solitary pulmonary nodule; supplemental parental nutrition; sympat... |
| SSDI | Social Security Disability Income; Supplemental Security Disability Income |