Tetragraph is a related term of digraph.
As nouns the difference between digraph and tetragraph
is that digraph is a directed graph while tetragraph is a group of four letters.
digraph
English
Etymology 1
.
Noun
(
en noun)
(graph theory) A directed graph.
Hyponyms
* multidigraph
See also
(other terms of interest)
* adjacency matrix
* finite relation
* incidence matrix
* (Directed graph)
Etymology 2
From (etyl) .
Noun
(
en noun)
(label) A two-character sequence used to enter a single conceptual character.
(label) A pair of letters, especially a pair representing a single phoneme.
Hyponyms
* diphthong, ligature
tetragraph
English
Noun
(
en noun)
A group of four letters.
Related terms
* digraph
* trigraph