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We found 17 dictionaries with English definitions that include the word perfect number: Click on the first link on a line below to go directly to a page where "perfect number" is defined. General (12 matching dictionaries) perfect number: American Heritage Dictionary of the English Language [home, info] perfect number: Collins English Dictionary [home, info] perfect number: Merriam-Webster's Online Dictionary, 11th Edition [home, info] perfect number: Wordnik [home, info] perfect number: Wiktionary [home, info] perfect number: The Wordsmyth English Dictionary-Thesaurus [home, info] perfect number: Infoplease Dictionary [home, info] perfect number: Dictionary.com [home, info] Perfect number: Wikipedia, the Free Encyclopedia [home, info] perfect number: Stammtisch Beau Fleuve Acronyms [home, info] perfect number: Free Dictionary [home, info] perfect number: Dictionary/thesaurus [home, info] Computing (1 matching dictionary) perfect number: Encyclopedia [home, info] Science (4 matching dictionaries) Perfect number: A Glossary of Mathematical Terms [home, info] Perfect Number: Eric Weisstein's World of Mathematics [home, info] perfect number: PlanetMath Encyclopedia [home, info] perfect number: Prime [home, info]