/ Dictionary / Index I isoagglutination: Meaning and Definition of Find definitions for: i•so•ag•glu•ti•na•tion Pronunciation: (ī"sō-u-glt"n-ā'shun), [key] — n. Med. the clumping of the red blood cells by a transfusion of the blood or serum of a genetically different individual of the same species. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: isoagglutination (Thesaurus) isoabnormal isoagglutinin Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language