Noun
Any one of several species of large oceanic fishes belonging to the Mackerel family, especially the common or great tunny (Orcynus / Albacora thynnus) native of the Mediterranean Sea and the Atlantic Ocean. It sometimes weighs a thousand pounds or more, and is extensively caught in the Mediterranean. On the American coast it is called horse mackerel. See Illust. of Horse mackerel, under Horse.
Source: Webster's dictionaryAfter a fruitless period during which Research Section cryptanalysts tried to work out how the Tunny machine worked, this and some other keys were handed to Tutte, who was asked to "see what you can make of these". Source: Internet
As part of an attack on Tunny, Max Newman and his colleagues helped specify the Colossus. Source: Internet
Before the Germans increased the security of their operating procedures, British cryptanalysts diagnosed how the machine functioned and built a machine that emulated it, (" British Tunny "). Source: Internet
The British called encrypted German teleprinter traffic " Fish ",sfn and the unknown machine and its intercepted messages " Tunny ". Source: Internet
The Colossus and Tunny galleries are open daily. Source: Internet
The Lorenz SZ 40/42 machine was used for high-level Army communications, termed "Tunny" by the British. Source: Internet