There are multiple definitions:

1. olfactory function(English)

   • common causes include nasal disorders, head trauma, and infections. The pathophysiology of post-infectious anosmia (such as in COVID-19) is unclear, but it is thought to involve olfactory neuroepithelium destruction or direct pathogen transmission to the brain through the olfactory nerve
   • OC, OE, OR, OS, OSN, SUS, COVID-19
   • Olfactory system, Infection
   • https://doi.org…455613211048998

2. olfactory fossa(English)

   • a depression in anterior cranial cavity whose floor is formed by cribriform plate of ethmoid. Lateral lamella, which forms its lateral boundary, is a thin plate of bone and is at risk of injury during functional endoscopic sinus surgery, especially when fossa is deep/asymmetric
   • FESS, PNS
   • Olfactory system, Medical imaging, Surgery
   • https://doi.org…jri.IJRI_119_18

3. oblique (45°) [bone] fixation(English)

   • FEM, HP, TF
   • Biophysics, Model(ing)
   • https://doi.org…3233/BME-161576

4. oligofructans(English)

   • considered as soluble dietary fiber
   • BSCF, AF, BSCFA, DF, OF, SCFA, SIEM, TIM-2
   • Nutrition, Microbiome
   • https://doi.org…res.2020.109036