Medical Abbreviations and Acronyms

1. ONTT
   Optic Neuritis Treatment Trial
2. ONU
   Organisation Des Nations Unies
3. ONW
   Office of Nursing Workforce
4. ONYC
   Onychomycosis
5. ONZ
   Ornidazole
6. OO
   Oophorectomy
7. OO
   Orbicularis Oculi
8. OO
   Overcomers Outraach
9. OO
   Osteoid Osteoma
10. OO
    sections û shorthand symbol used to designate sections in a legal document; as in ºº201(m), 301(k) o
11. OOA
    Old Order Amish
12. OOA
    Out-Of-Area
13. OOA
    Over Overgacting
14. OOA
    Ontario Orthopaedic Assoviation
15. OOA
    Ontario Osteopathic Association
16. OOB
    Out of Bed
17. OOBES
    Out-Of-Body Experiences
18. OOC
    Orbicularis Yculi
19. OOD
    Office of Disability
20. OOD
    Out-Of-Date

Last updated: May 2, 2025 — Total entries: 207,332