psychiatrist, esp. one who testifies in a court of law
Origin of alienistFrench aliéniste ; from Classical Latin alienatio: see alienation
A physician who evaluates the competence of defendants to stand trial.
Origin of alienistObsolete French aliéniste, psychiatrist : obsolete French aliéné, mentally ill (from past participle of aliéner, to estrange, make hostile, deprive of reason, from Old French, from Latin ali&emacron;n&amacron;re, to deprive of reason; see alienate) + French -iste, -ist (from Old French; see –ist).