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digraph

[dahy-graf, -grahf] /ˈdaɪ græf, -grɑf/
noun
1.
a pair of letters representing a single speech sound, as ea in meat or th in path.
Origin
1780-1790
1780-90; di-1 + -graph
Related forms
digraphic
[dahy-graf-ik] /daɪˈgræf ɪk/ (Show IPA),
adjective
digraphically, adverb
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for digraphs

digraph

/ˈdaɪɡrɑːf; -ɡræf/
noun
1.
a combination of two letters or characters used to represent a single speech sound such as gh in English tough Compare ligature (sense 5), diphthong
Derived Forms
digraphic (daɪˈɡræfɪk) adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for digraphs

digraph

n.

1788, in linguistics, from Greek di- "twice" (see di- (1)) + -graph "something written," from Greek graphe "writing," from graphein "to write, express by written characters," earlier "to draw, represent by lines drawn" (see -graphy). In mathematics, from 1955, a contraction of directed graph.

Online Etymology Dictionary, © 2010 Douglas Harper
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Word Value for digraphs

15
16
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