Polybius square (English, noun)
expansion: Polybius square (plural Polybius squares)
Senses:
topics: communications
electrical-engineering
engineering
natural-sciences
physical-sciences
telecommunications
glosses: A character code represented by two sets of six lit torches, used to send messages character by character, in a two point visual fire telegraph. The character code is generated by encoding characters in a grid, where each character generates two numbers, uniquely representing each character as a pair of numbers.
tags: historical
topics: computing
cryptography
engineering
mathematics
natural-sciences
physical-sciences
sciences
glosses: A grid used for fractionating plaintext characters so that they can be represented by a smaller set of symbols.
Forms:
form: Polybius squares
tags: plural