/ Dictionary / Index T terrachlor: Meaning and Definition of Find definitions for: ter•ra•chlor Pronunciation: (ter'u-klôr", -klōr"), [key] — n. Chem. pentachloronitrobenzene. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. terrace terracing Related Content Daily Word Quiz: resilient Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language