Lipograms

thumb|Plaque in tribute to Georges Perec by [[Christophe Verdon. Café de la Mairie, Place Saint-Sulpice in Paris]] A lipogram (from , leipográmmatos, "leaving out a letter") is a kind of constrained writing or word game consisting of writing paragraphs or longer works in which a particular letter or group of letters is avoided. Extended Ancient Greek texts avoiding the letter sigma are the earliest examples of lipograms.

novel by Ernest Vincent Wright

1969 novel by Georges Perec

"Lebdeğmez atışma" or "Dudak değmez aşık atışması" in Turkey, whose literal meaning in Turkish is "two troubadours throwing verses at each other where lips do not touch each other", is the traditional and still practiced event of oratory match, a form of instantaneously improvised poetry sang by opposing Ashiks taking turns for artfully criticising each other with one verse at a time, is done by each first placing a pin between their upper and lower lips so that the improvised song, usually accompanied by a Saz (played by the ashik himself), consists only of labial lipograms i.e. without words

A univocalic is a type of antilipogrammatic constrained writing that uses only consonants and a single vowel, in English "A", "E", "I", "O", or "U", and no others.