(1) The International Phonetic Alphabet's name for the velar nasal sound (e.g. the ing in sing).
(2) The name of the Latin-alphabet derived symbol that is used to represent this sound: majuscule Ŋ and minuscule ŋ.

Etymology -
The letter was designed by Alexander Gill the Elder in 1619, and it was first used with its current phonetic value in Benjamin Franklin's phonetic alphabet.

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