There are multiple definitions:

1. oxygen- and glucose-depleted(English)

   • OGR
   • Oxygen

2. oesophago-gastric dissociation(English)

   • GER, GOR, NI, M-OGD, TOGD
   • Mouth, esophagus and stomach, Pathology, Surgery
   • https://doi.org…304-020-00934-z

3. oxygen-glucose deprivation(English)

   • PKCα-MARCKS, BDNF, DAGO, DAMGO, DOR, HIT
   • Oxygen
   • https://doi.org…636897211041585

4. oesophagogastroduodenoscopy(English)

   • effective method for screening and surveillance of portal hypertension in patients with cirrhosis; also denoted as EGD
   • EGD, ERCP, EUS, GI, PES
   • Gastroenterology, Medical imaging, Screening, Surveillance
   • https://doi.org…-1529-3.00013-0

5. Office of Generic Drugs(English)

   • API, CMC, DMF, QbR
   • Pharmacology / pharmaceutics
   • https://doi.org…02447-8.00039-X