/ Dictionary / Index C chloracne: Meaning and Definition of Find definitions for: chlor•ac•ne Pronunciation: (klôr-ak'nē, klōr-), [key] — n. Pathol. a severe and sometimes persistent form of acne resulting from exposure to chlorine compounds, such as dioxin. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. chloracetophenone chloral Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language