Found:

Anterior

PHONOLOGY/PHONETICS: a feature which characterizes phonemes that are produced with an obstruction located in the front of the palato-alveolar region of the mouth. The palato-alveolar region is where the ordinary /'cup'-s/ is produced. EXAMPLE: anterior sounds in English are /p/, /b/, /m/, /t/, /d/, /n/, /f/, and /v/.

LIT.	Chomsky, N. and M. Halle (1968) Halle, M. & G. Clements (1983)