Short for dermatology or the skin; informal term used by medical professionals.
Shortened form of 'dermatology,' which comes from Greek 'derma' (skin) + 'logia' (study of). The prefix 'derm-' is used throughout medicine to refer to skin-related conditions.
Medical professionals create their own shorthand for efficiency—'derm' is how doctors talk quickly about skin concerns, but it also shows how specialized communities develop their own linguistic shortcuts.
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