| ISE | inhibited sexual excitement; International Society of Endocrinology; International Society of Endosc... |
|---|---|
| ISI | infarct size index; initial slope index; injury severity index; Institute for Scientific Information... |
| ISMED | International Society on Metabolic Eye Disorders ISMH International Society of Medical Hydrology |
| ISN | integrated service network; International Society of Nephrology; International Society of Neurochemi... |
| mIU | milli-international unit; one-thousandth of an international unit |