List of medical abbreviations: 0-9

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Abbrev. Meaning
Δ diagnosis;
change
ΔΔ differential diagnosis (the list of possible diagnoses, and the effort to narrow that list)
# fracture
#NOF fracture to the neck of the femur
(R with crossed tail) prescription
Ψ psychiatry
Σ sigmoidoscopy
x/12 x number of months
x/40 x number of weeks of pregnancy
x/52 x number of weeks
x/7 x number of days
5-HIAA 5-hydroxyindoleacetic acid
5-HT 5-hydroxytryptamine, that is, serotonin