Located or occurring upon or above the epidermis (outer layer of skin); relating to structures or conditions on the skin's surface.
From Greek 'epi-' (upon, above) plus 'derma' (skin). Wait—actually from 'ene-' or 'en-' (in) plus 'epidermic.' The exact formation is unclear but likely means 'in the epidermis' rather than upon it.
Medical terminology can be confusing because prefix meanings sometimes conflict—'epi' usually means 'upon,' but 'enepidermic' seems to mean something more like 'in the outer layers,' showing how medical Latin isn't always perfectly logical.
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