1846, from Fr. psychiatrie, from M.L. psychiatria, lit. "a healing of the soul," from Gk. psykhe- "mind" (see psyche) + iatreia "healing, care." Psychiatrist first recorded 1890; the older name was mad-doctor (1703).
"A psychiatrist is a man who goes to the Folies Bergère and looks at the audience." [Anglican Bishop Mervyn Stockwood, 1961]