Plural of anagram; words or phrases formed by rearranging all the letters of another word or phrase.
From Greek 'ana' (back, again) + 'gramma' (letter), originally a Greek literary game that became hugely popular in medieval and Renaissance Europe.
Some famous anagrams: 'astronomer'='moon starer,' 'dormitory'='dirty room'—the best ones seem to reveal hidden truths, which is probably why people have obsessed over them since ancient times.
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