| Acronym | Definition |
|---|
| SCIg | Subcutaneous Immunoglobulin (medical treatment) |
| SCIg | Squirrel Cage Induction Generator (wind turbines) |
| SCIg | Southern California International Gateway |
| SCIg | Scottish Curling-Ice Group (Scotland, UK) |
| SCIg | Scottish Construction Industry Group (UK) |
| SCIg | State Correctional Institution at Graterford (Pennsylvania) |
| SCIg | Submarine Cable Improvement Group (est. 1995) |
| SCIg | Simulator Component Inoperative Guide (transportation industry regulation; Canada) |
| SCIg | Steuben County Industrial Guild (Angola, IN) |