/ Dictionary / Index T Thiodan: Meaning and Definition of Find definitions for: Thi•o•dan Pronunciation: (thī'u-dan"), [key] — Trademark. Trademark.(sometimes l.c.) a brand of endosulfan. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. thiocyanic acid Thiokol 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