Merriam-Webster Collegiate Dictionary - catalepsy

 noun  (plural -sies)  Etymology: Middle English catalempsi, from Medieval Latin catalepsia, from Late Latin catalepsis, from Greek katalepsis, literally, act of seizing, from katalambanein to seize, from kata- + lambanein to take — more at latch  Date: 14th century a trancelike state marked by loss of voluntary motion in which the limbs remain in whatever position they are placed  • cataleptic adjective or noun  • cataleptically adverb