/ Dictionary / Index H hemagglutination: Meaning and Definition of Find definitions for: he•mag•glu•ti•na•tion Pronunciation: (hē"mu-glt"n-ā'shun, hem"u-), [key] — n. the clumping of red blood cells. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: hemagglutination (Thesaurus) hemagglutinate hemal Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language