| NCI | National Cancer Institute; noncriterion ischemic [animal]; nuclear contour index; nursing care integ... |
|---|---|
| PDI | pain disability index; periodontal disease index; plan-do integration; psychomotor development index... |
| SCSIT | Southern California Sensory Integration Test |
| SI | International System of Units [Fr. le Systeme International d'Unites]; sacroiliac; saline infusion; ... |
| SSI | segmental sequential irradiation; shoulder subluxation inhibition; small-scale integration; Social S... |