ETYM Greek, inclined to sleep, putting to sleep, from hypnos sleep; akin to Latin somnus, and Eng. somnolent: cf. French hypnotique.
Any substance (such as barbiturate, benzodiazepine, alcohol) that depresses brain function, inducing sleep. Prolonged use may lead to physical or psychological addiction.
Attracting and holding interest as if by a spell; SYN. mesmeric, mesmerizing, spellbinding.