| iPGE | immunoreactive prostaglandin E |
|---|---|
| iPTH | immunoassay for parathyroid hormone; immunoreactive parathyroid hormone |
| IR | drop of voltage across a resistor produced by a current; ileal resection; immune response; immunizat... |
| ir | immunoreactive; intrarectal; intrarenal |
| IR-ACTH | immunoreactive adrenocorticotropic hormone |