Path. [f. Gr. κατά down + -τονία, from τόνος TONE.] A form of insanity, characterized by epilepsy and catalepsy (Cent. Dict.). Hence Katatoniac, one who is affected with katatonia.
1888. Alien. & Neurol., July, 458. Kiernan found four head injuries among 30 katatoniacs.
