/ 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: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language