alveolar

Concise Oxford English Dictionary © 2008 Oxford University Press:
alveolar /alˈvɪələ, ˌalvɪˈəʊlə/

▶adjective

• 1 Anatomy relating to an alveolus.

• 2 Phonetics (of a consonant) pronounced with the tip of the tongue on or near the bony ridge containing the alveoli of the upper teeth (e.g. n, s, d, t).

▶noun Phonetics an alveolar consonant.