A person affected with melancholia; a melancholy maniac.(noun)
The Century Dictionary (Public Domain)
Use "melancholiac" in a sentence
"He went so far as to question Scripture: "If there are thus no other signs necessary to demon possession, than those which are described by the Evangelists, [then] every epileptic, melancholiac, phrenetic, will have the devil in their body: and there will be more demoniacs in the world than fools.""
"The posture and expression remind us at once of the katatonia which is symptomatic of dementia præcox and other stuporose and melancholiac conditions in adult life."
"I daresay I _am_ -- but I _do_ object to being made out a hopeless melancholiac!"