Breadcrumb Home > Dictionary > Index A absorption coefficient: Meaning and Definition of Find definitions for: absorp'tion coeffi"cient Pronunciation: [key] — Physics, Optics. Physics,Optics. a measure of the rate of decrease in the intensity of electromagnetic radiation, as light, as it passes through a given substance. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. absorption band absorption dynamometer TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language