Meaning of haplography

hap•log•ra•phy

Pronunciation: (hap-log'ru-fē), [key]
— n.
  1. the accidental omission of a letter or letter group that should be repeated in writing, as in Missippi for Mississippi. Cf. dittography.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.