A word, or writing which omits a symbol or symbols.(noun)
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Use "lipogram" in a sentence
"For Joshua Cohen's own version of a "lipogram," a work with a missing symbol, Benjamin Israelien's void after another, now total, global decimation of the Chosen People erodes him from the inside out."
"It's the hardest kind of lipogram, as it doesn't contain the letter E - the most common letter in the English language."
"A difficult task to construct a lipogram – such a short scrap was a taxing duty."