Endogenous-depression
noun, Psychiatry.
1.
a severe form of depression usually characterized by insomnia, weight loss, and inability to experience pleasure, thought to be of internal origin and not influenced by external events.
endogenous depression n.
A group of symptoms that resemble depression but are not precipitated by a stressful experience, especially psychomotor agitation or retardation, insomnia and early morning awakening, weight loss, excessive guilt, and a lack of reactivity to one’s environment.
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