Playfair

(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)

• (craters): The craters are Named after Scottish mathematician, scientist and C of S minister John Playfair
• (cipher): The cipher is Named after British Lord, baron, politician and scientist Lyon Playfair, who popularized the cipher.

Playfair (countable and uncountable, plural Playfairs)

1. A surname.
2. A placename
   1. A number of craters in Solar System

      Synonyms: Playfair Crater, Crater Playfair

      1. A crater in Mars, Solar System
      2. A crater in Moon, Earth-Moon System, Solar System

Playfair (countable and uncountable, plural Playfairs)

1. (cryptography) Ellipsis of Playfair cipher..
2. (cryptography) an encryption using the Playfair cipher
   • 1932, Dorothy Sayers, Have His Carcase‎:

     Here's a cipher message. Probably Playfair.

• Fairplay, fair play