/ Dictionary / Index O ortho-dichlorobenzene: Meaning and Definition of Find definitions for: or•tho-di•chlo•ro•ben•zene Pronunciation: (ôr"thu-dī-klôr"u-ben'zēn, -ben-zēn', -klōr"-), [key] — n. Chem. a colorless liquid with a pleasant odor, CHCl, used as a solvent for a wide range of organic materials. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ortho-cousin orthodontia Related Content Daily Word Quiz: epoch Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language