lipogram (n.)

"writing which avoids all words containing a particular letter" (an ancient literary pastime; in English typically -e-), 1711, abstracted from Greek lipogrammatikos, literally "wanting a letter," from stem of leipein "to leave, be lacking" (from PIE root *leikw- "to leave") + gramma "a letter, character" (see -gram).

If Youth, throughout all history, had had a champion to stand up for it; to show a doubting world that a child can think; and, possibly, do it practically, you wouldn't constantly run across folks today who claim that "a child don't know anything." A child's brain starts functioning at birth; and has, amongst its many infant convolutions, thousands of dormant atoms, into which God has put a mystic possibility for noticing an adult's act, and figuring out its purport. [Ernest Vincent Wright, "Gadsby: A Story of Over 50,000 Words without Using the Letter 'e'," Los Angeles: 1939]