Look up trigraph in Wiktionary, the free dictionary.

Trigraph may refer to:

Computing

• Digraphs and trigraphs (programming), a group of characters used to symbolise one character
• An octal or decimal representation of byte values
• Mnemonics for machine language instructions
• As language codes in ISO 639

Cryptography

• As substitution group in a substitution cipher
• As combinations in the Ling Qi Jing

Mathematics

• As a generalization of graphs where there is a set of edges called semi-adjacent

Other uses

• Trigraph (orthography), a sound representation in orthography

See also

• Digraph (disambiguation)
• Tetragraph
• Multigraph (disambiguation)

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