Breadcrumb Home > Dictionary > Index B biological accumulation: Meaning and Definition of Find definitions for: biolog'ical accumula'tion Pronunciation: [key] the accumulation within living organisms of toxic substances occurring in the environment. Also calledCf. biological magnification. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. biological biological child ✖ Related Content Daily Word Quiz: donnybrook Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language