3 ms·

In typography the term diphthong also. Means the character itself - "a digraph representing the sound of a diphthong or single vowel". I can't speak to the poss

In typography the term diphthong also. Means the character itself - "a digraph representing the sound of a diphthong or single vowel". I can't speak to the possible typo in the word itself, but I believe it might be a old spelling of the same word.

bradrn 3y ago
All I can say is that I’ve never seen this usage before.
zvr 3y ago
No, it cannot be an old spelling, since it comes from Greek: an initial "di-" (δι- from dual, two) and then phthong (φθόγγος, voice). So the two initial letters of the second part are phi and theta.