GI
GI (G.I.), Gi or gi may refer to:
In science and measurement:
- Galvanized iron, iron that has been electrochemically rustproofed with zinc
- Gastrointestinal, a division of the human anatomy in medicine
- GenInfo Identifier, a database key in the NCBI's Genbank database
- Geodætisk Institut, a former Danish cartographic institute
- Geographic information
- Geographical indication
- Geophysical Institute, a research institution at the University of Alaska Fairbanks
- The complexity class GI of problems reducible to the graph isomorphism problem
- Gill (volume), a U.S. unit of volume equal to 4 U.S. fluid ounces and an Imperial unit equal to 5 imperial fluid ounces
- Global illumination, the rendering of light in 3D computer graphics scenes
- Glycemic index, a ranking system for carbohydrates based on their effect on blood glucose levels
- Granuloma inguinale, an alternate name for donovanosis, a bacterial infection
- Gibi or Gi, the IEEE prefix that represents 230
- Gilbert (unit) (Gb or Gi), a former CGS unit of magnetomotive force or magnetic potential
- Gi protein, a heterotrimeric G protein subunit which has an inhibitory effect
- Guard interval, a delay used in telecommunications to prevent signal interference
In sports and martial arts:
- Greg Inglis, Australian rugby league footballer nicknamed "GI"
- Keikogi or dogi, the traditional training uniform in Japanese or Japanese derived martial arts include.
- Group I (also written Grade I or Group 1), in horse racing, younger horses generally represented by the lower number; listings 1–3 are usually Roman numerals
In music:
- (GI), an album by The Germs
In geography:
Other uses: