/ Dictionary / Index N Nembutal: Meaning and Definition of Find definitions for: Nem•bu•tal Pronunciation: (nem'byu-tôl", -tal"), [key] — Pharm., Trademark. Pharm.,Trademark. a brand of pentobarbital. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: nembutal (Thesaurus) nematomorph Nembutsu* Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language