Definitions from Wiktionary (Playfair)

▸ noun:  A surname.
▸ noun:  A placename
▸ noun:  A number of craters in Solar System
▸ noun:  A crater in Mars, Solar System
▸ noun:  A crater in Moon, Earth-Moon System, Solar System
▸ noun:  (cryptography) an encryption using the Playfair cipher
▸ noun:  (crosswording) A form of crossword in which some words must be encrypted with a Playfair cipher before being inserted into the grid, and solvers must deduce the codeword and the encrypted clues.
▸ noun:  (cryptography) Ellipsis of Playfair cipher.. [A manual symmetric encryption technique that encrypts pairs of letters (digraphs).]




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