| RID | radial immunodiffusion; remission-inducing drug; ruptured intervertebral disc |
|---|---|
| FSI | foam stability index; Food Sanitation Institute; functional status index; function status index |
| FST | foam stability test |
| SF | Sabin-Feldman [test]; safety factor; salt-free; scarlet fever; screen film; seminal fluid; serosal f... |
| UFFI | urea formaldehyde foam insulation |