Main Entry: di·graph

Pronunciation: \ˈdī-ˌgraf\

Function: noun

Date: 1780

1 : a group of two successive letters whose phonetic value is a single sound (as ea in bread or ng in sing) or whose value is not the sum of a value borne by each in other occurrences (as ch in chin where the value is \t\ + \sh\)
2 : a group of two successive letters
3 : ligature 4

— di·graph·ic \dī-ˈgra-fik\ adjective

— di·graph·i·cal·ly \-fi-k(ə-)lē\ adverb