This tends to be the most difficult form of the lipogram.

It can thus be considered a lipogram, excluding the other four vowels.

The lipogram virus turns up too in ancient Persian writings.

The word lipogram is not always included in dictionaries.

La Disparition is, to date, the longest lipogram in existence.

Can you try to write a lipogram?

A pangrammatic lipogram is a text that uses every letter of the alphabet except one.

His lipogram novel Noe School contains not a single E.

Lipogram: a letter (commonly e or o) is outlawed.

The English translation, A Void, is also a lipogram.

For example, entire novels have been written that omit the letter "" altogether - a form of literature known as a lipogram.

While some authors excluded other letters, it was the exclusion of the R which ensured the practice of the lipogram continued into modern times.

In Sweden a form of lipogram was developed out of necessity at the Linköping University.

In a sense, the pangram is the opposite of the lipogram, in which the aim is to omit one or more letters.

While a lipogram is usually limited to literary works, there are also chromatic lipograms, works of music that avoid the use of certain notes.

Each of the five chapters in this book is a lipogram; however, rather than omitting a single letter in each chapter, it omits many.

Gadsby is a 1939 novel by Ernest Vincent Wright written as a lipogram, which does not include words that contain the letter "e".

In his book Rethinking Writing, Roy Harris notes that without the ability to analyse language, the lipogram would be unable to exist.

In October 1930 Wright approached the Evening Independent newspaper and proposed it sponsor a blue lipogram writing competition, with $250 for the winner.

Larousse defines a lipogram as a "literary work in which one compels oneself strictly to exclude one or several letters of the alphabet."

For example, the little known lipogram: 'A lipogram is a literary composition which omits a certain letter of the alphabet.

This makes the lipogram, according to Quintus Curtius Rufus, "the most ancient systematic artifice of Western literature."

Lasus of Hermione is the most ancient author of a lipogram, who lived during the second half of the sixth century BCE.

He was translating into English the brilliant novel by Georges Perec, "La Disparition" - a lipogram written entirely without the letter "e."

Trevor Kitson, writing in New Zealand's Manawatu Standard in 2006, said he was prompted to write a short lipogram after seeing Wright's book.