/ Dictionary / Index D diplacusis: Meaning and Definition of Find definitions for: dip•la•cu•sis Pronunciation: (dip"lu-ky'sis), [key] — pl. -ses a difference in hearing by the two ears so that one sound is heard as two. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dipl. diplegia Related Content Daily Word Quiz: penchant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language