There are multiple definitions:

1. odds ratio(English)

   • the odds of the event occurring in an exposed group versus the odds of the event occurring in a non-exposed group
   • ADOR, AOR, HR
   • Statistics
   • https://www.ncb…ooks/NBK431098/

2. operating room(English)

   • a facility within a hospital where surgical operations are carried out in an aseptic environment
   • ER
   • Surgery

3. open resection(English)

   • procedure to control seizure
   • MTLE, SLA, SLAH
   • Epilepsy or syncope, Surgery
   • https://doi.org…ebr.2020.100370

4. opioid receptor(English)

   • the μ, δ1 , δ2 , and κ1 opioid receptor agonists represent the most promising group of opioids for the creation of drugs enhancing cardiac tolerance to the detrimental effects of ischemia/reperfusion
   • I/R, DADLE, DAGO, DOR
   • Cardiology, Brain (dys)function
   • https://doi.or10.1002/med.21395
   • https://www.ncb…les/PMC6891617/

5. odorant receptor(English)

   • chemosensory systems in animals allow to extract information from chemical environments, so that behavioral preferences are elicited in response to stimuli that may be aversive or attractive
   • Olfactory system, Receptors, Veterinary medicine
   • https://pubmed.…h.gov/26042329/

6. object recognition(English)

   • increasing plasticity by manipulation of perineuronal nets offers a novel therapeutic approach to the treatment of memory loss in neurodegenerative disorders
   • AAV-P301S, chABC, fEPSP
   • Brain (dys)function, Memory, Adaptation & plasticity, Alzheimer's disease, Synapse
   • https://doi.org…rol.2014.11.013