| NRI | nerve root involvement; nerve root irritation; nonrespiratory infection |
|---|---|
| PII | plasma inorganic iodine; primary irritation index |
| SIS | semantic indexing system; serotinin irritation syndrome; simian sarcoma; simulator-induced syndrome;... |
| VIS | vaginal irrigation smear; venous insufficiency syndrome; vertebral irritation syndrome; visible; vis... |