| IS | Intercostal Space = ICS |
|---|---|
| IS | ileal segment; immediate sensitivity; immune serum; immunosuppression; impingement syndrome; incentive spirometer; index of sexuality; infant size; infantile spasms; information system; insertion sequence; in situ; insulin secretion; intercellular space; intercostal space; interictal spike; interstitial space; intracardial shunt; intraspinal; intrasplenic; intrastriatal; intraventricular septum; invalided from service; inversion sequence; ischemic score; isoproterenol |
| Is | incision superius |
| is | in situ; island; islet; isolated |
| ISA | 1) Intrinsic Sympathomimetic Activity 2) Industrial Standard Architecture; 산업표준구조 |
| ISA | Instrument Society of America; intracarotid sodium amytal; intrinsic simulating activity; intrinsic sympathomimetic activity; iodinated serum albumin; irregular spiking activity |
| Isa | spatial average intensity [pulse] |
| ISADH | inappropriate secretion of antidiuretic hormone |
| Isapa | spatial average pulse average |
| Isapt | spatial peak, temporal average intensity [pulse] |