/ Dictionary / Index C chlorine 36: Meaning and Definition of Find definitions for: chlorine 36 Pronunciation: [key] the radioactive isotope of chlorine having a mass number 36 and a half-life of about 440,000 years, used chiefly as a tracer. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. chlorine chlorine dioxide Related Content Daily Word Quiz: jaundice Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language