It is called a consonant blend or a digraph

A consonant blend is when two or more consonants appear together and you hear each sound that each consonant would normally make. -- As in fingerprint

A digraph is when the two letters represent a single sound. -- As in fang

If described according to it's point of articulation it is a velar nasal consonant

An agma is a symbol used to represent the nasal velar consonant in IPA - similar to a hooked "n", the sound represents the "ng" of the word "sing".

Tongue has a schwa vowel followed by a voiced consonant called the velar nasal, which gives it a long syllable. The terms "long" and "short" do not properly apply to English vowel sounds.

The duration of Labial Geyser is 60.0 seconds.

'' Labial " pertains to " Labium" which is an anatomical reference to the lip.