Adjective
Omitting a letter; composed of words not having a certain letter or letters; as, lipogrammatic writings.
Source: Webster's dictionaryPangrammatic lipogram A pangrammatic lipogram or lipogrammatic pangram uses every letter of the alphabet except one. Source: Internet
Identifying lipograms can also be problematic, as there is always the possibility that a given piece of writing in any language may be unintentionally lipogrammatic. Source: Internet