Definify.com

Webster 1913 Edition

Adj.

[See

Employing the same letters to represent different sounds in different words or syllables; – said of methods of spelling;

as, the ordinary English orthography is

heterographic

heterographic ‎(not comparable)

Misspelled; of or pertaining to an incorrect spelling or a spelling that differs from accepted standards.
(linguistics) Of a writing system in which a particular symbol represents more than one possible sound.
In English. many letters are heterographic.
- 2000, Po-Ching Yip, The Chinese Lexicon: A Comprehensive Survey‎, page 16
  Quite often, more than one heterographic monosyllable […] can represent the same mononym in particular contexts if they are semantically indifferentiable.
- 2008, Elena L. Grigorenko & Adam J. Naples, Single-word Reading: Behavioral and Biological Perspectives‎, page 140
  English has few such heterophonic homographs, hence much of the work in English (and French) examining orthography-phonology consistency effects at the whole-word level has focused on heterographic homophones.

misspelled; of or pertaining to an incorrect spelling

linguistics: of a writing system in which a particular symbol represents more than one possible sound