AD

abductor digiti minimi [muscle]; above diaphragm; absorbed dose; acceptable daily intake; accident dispensary; accidental death; acetabular depth; acetate dialysis; active disease; active domain; acute dermatomyositis; addict, addiction; adenoid degeneration [agent]; adjuvant disease; admitting diagnosis; adrenodoxin; adrenostenedione; adult disease; advanced directive; aerosol deposition; affective disorder; after discharge; alcohol dehydrogenase; Aleutian disease; alveolar diffusion; alveolar duct; Alzheimer dementia; Alzheimer disease; analgesic dose; analog device; anodal duration; anterior division; antigenic determinant; appropriate disability; arthritic dose; associate degree; atopic dermatitis; attentional disturbance; Aujeszky disease; autistic disorder; autonomic dysreflexia; autosomal dominant; average deviation; average difference; axiodistal; axis deviation; right ear [Lat. auris dextra; JCAHO unapproved abbreviation]

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AD abbr

1) Alzheimer's disease

2) average deviation

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[L. ad to] used in writing prescriptions to indicate that a substance (usually a diluent) be added up to a certain amount.