lipogram

A lipogram (from , leipográmmatos, "leaving out a letter") is a kind of constrained writing or word game consisting in writing paragraphs or longer works in which a particular letter or group of letters is avoided—usually a common vowel, and frequently E, the most common letter in the English language. Larousse defines a lipogram as a "literary work in which one compels oneself strictly to exclude one or several letters of the alphabet." Extended Ancient Greek texts avoiding the letter sigma are the earliest examples of lipograms.