eng·ma 
(ĕngmə) or ang·ma (ăng-) or ag·ma (ăg-)
(ĕngmə) or ang·ma (ăng-) or ag·ma (ăg-)n.
1. The voiced velar nasal consonant having the sound (ng), as represented by the ng of sing and the n of sink.
2. The symbol (ŋ) used to represent this sound in some phonetic transcription systems and various other writing systems based on the Roman alphabet.
[From Greek agma, the sound engma (perhaps influenced by ENG).]