Medical Abbreviation
AD
AD is a medical abbreviation with more than one meaning — most commonly Right ear / Alzheimer's disease. Its meaning depends on the clinical context.
What does AD mean?
| Meaning | Context | Field |
|---|---|---|
| Right ear (auris dextra) | Ear examinations and drops | ENT |
| Alzheimer's disease | Neurology | Neurology |
| Advance directive | End-of-life planning | General |
Why it matters
AD as "right ear" (auris dextra) versus Alzheimer's disease versus advance directive are unrelated. The ear abbreviations are on many do-not-use lists.
Related abbreviations
Study reference only — not medical advice. Always consult qualified sources and supervisors for clinical decisions.