Definition of "involutional" []

• Of or pertaining to involution (adjective)
• Characterized by involution (adjective)

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• "Initially operations were performed on a majority of patients with affective disorders, i.e. various types of depression, such as involutional depression, agitated depression and so on."
• "For example, in the old days, which is to say before the DSM-III, doctors talked about manic-depressive illness, in which patients alternated between those two poles; involutional psychotic reaction, a condition of delusional guilt and self-loathing that came on in middle age; and depressive neurosis, the garden-variety unhappiness that psychoanalysts treated in the Freudian heyday."
• "Over the years, the condition has been called many things, including manic-depression, circular insanity, and involutional melancholia."