Inflammation of the skin and underlying tissues (a rare or archaic medical term).
From Greek 'dera' (skin) + 'aden' (gland) + '-itis' (inflammation). A very rare medical terminology, possibly obsolete, combining classical Greek medical terminology to describe skin inflammation.
This word is so obscure that it might only exist in massive medical dictionaries—it shows how doctors used to coin incredibly specific Greek-based terms for every tiny variation of inflammation!
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