Major depression

Definition: one or more periods of depression in the absence of history of manic or hypomanic episodes; chronic type lasts 2 or more years; melancholic type is more severe, has vegetative signs, and responds well to somatic therapy.

Synonyms (terms occurring on more labels are shown first): major depressive disorder, major depression, major depressive disorders, major depressive illness, Major Depressive D isorder, Major D epressive D isorder, Major DepressiveDisorder, Major D epressive Di sorder

More information: PubMed search and possibly Wikipedia