The term for a word that contains all the letters of the alphabet is "pangram." A well-known example of a pangram in English is, "The quick brown fox jumps over the lazy dog." Pangrams are often used in typography and font design to display the full set of letters in a particular typeface. Creating a pangram can be a fun challenge for writers and linguists, as it requires crafting a coherent sentence that includes every letter of the alphabet at least once. In addition to being a linguistic curiosity, pangrams are useful for testing keyboards and software.