Is there a term for sounds that are spelled with multiple letters?

Is there a word or term to describe sounds (phonemes) that are spelled using multiple characters (graphemes)? Examples would include the English ch, sh, or German dsch, tsch, etc.


Solution 1:

When I was in elementary school, these were called (consonant) blends:

A consonant blend (also called a consonant cluster) is a group of two or three consonants in words that makes a distinct consonant sound, such as bl, br, cl, cr, dr, fl, fr, gl, gr, pl, pr, qu, sc, sk, sl, sm, sn, sp, st, sw, tr, and tw

The more technical terms for this are digraph, trigraph, quadgraph, etc.