| PTB | patellar tendon bearing; prior to birth |
|---|---|
| PTR | patellar tendon reflex; patient termination record; patient to return; peripheral total resistance; ... |
| ESA | Electrolysis Society of America; endocardial surface area; epidermal surface antigen; esterase; este... |
| SA | salicylic acid; saline [solution]; salt added; sarcoidosis; sarcoma; scalenus anticus; secondary ame... |
| SSD | shaded surface display; single saturating dose; Social Security disability; source-skin distance; so... |