There are multiple definitions:

1. obstetrics(English)

   • GYN
   • Gynecology, Woman /female, Obstetrics

2. olfactory bulb(English)

   • MC, SVZ, ACE2, COVID-19, EEG, OC, OE, OF, OR, OS, OSN, SUS, IOL
   • Brain (dys)function, Olfactory system
   • https://www.ncb…les/PMC6758521/
   • https://doi.org…455613211048998
   • https://doi.org…3/chemse/bju047

3. obstetric nurse(English)

   • Nurse / nursing, Obstetrics
   • https://www.glo…rse-or-midwife/

4. oligonucleotide/oligosaccharide-binding(English)

   • DNA fold domain that binds single-stranded DNA in both prokaryotes and eukaryotes
   • DSB, MEIOB, NOA, SPATA22, WES
   • Genetics, Genomics
   • https://doi.org…238.2010.488216

5. Otilonium bromide(English)

   • a spasmolytic compound of the family of quaternary ammonium derivatives and has been successfully used in the treatment of patients with irritable bowel syndrome
   • IBS
   • Gastroenterology, Therapeutic approaches
   • https://doi.org…756283X14525250

6. oral bioavailability(English)

   • refers to integrated strategy for accurately screening biomarkers based on metabolomics coupled with network pharmacology
   • DL, PPI, TCM, TCMSP, TTD
   • Pharmacology / pharmaceutics
   • https://doi.org…nta.2020.120710

7. Outerbridge [grade](English)

   • refers to the medial femoral condyle
   • MMPRT, HTO, HSS, KL, MME
   • Knee, Surgery
   • https://doi.org…167-020-06151-w

8. osteoblast(English)

   • reports suggest that a large number of molecules produced by immune cells affect bone cell activity
   • BMD, GIO, PD
   • Immunology, Skeleton and bone (formation)
   • https://doi.org…155/2015/108451

9. oat bran(English)

   • LFLC, POB
   • Diet, Atherosclerosis /atherogenic, Risk factor
   • http://pubmed.n…ih.gov/2154513/

10. own brand [cigarette](English)

    • ECIG, e-cig
    • Addiction and health, Toxicology, Respiratory system
    • https://doi.org…dep.2019.05.024