Diagraph vs. Digraph

Diagraphnoun

(dated) A drawing instrument that combines a protractor and scale.

Diagraphnoun

A drawing instrument, combining a protractor and scale.

Digraphnoun

(graph theory) A directed graph.

Digraphnoun

(computing) A two-character sequence used to enter a single conceptual character.

Digraphnoun

(linguistics) A pair of letters, especially a pair representing a single phoneme.

Digraphnoun

Two signs or characters combined to express a single articulated sound; as ea in head, or th in bath.

Digraphnoun

two successive letters (especially two letters used to represent a single sound: `sh' in `shoe')

Digraphnoun

a combination of two letters representing one sound, as in ph and ey.

Digraphnoun

a character consisting of two joined letters; a ligature.