alveolar

1. Of or relating to an alveolus.
2. Anatomy.
   1. Relating to the jaw section containing the tooth sockets: the alveolar ridge.
   2. Relating to the alveoli of the lungs.
3. Linguistics. Formed with the tip of the tongue touching or near the inner ridge of the gums of the upper front teeth, as the English (t), (d), and (s).

Pertaining to an alveolus.

Alveolar mucosa. (Liebgott, 2001)

Relating to an alveolus.

The noun has one meaning:

Meaning #1: a consonant articulated with the tip of the tongue near the gum ridge
  Synonyms: alveolar consonant, dental consonant

The adjective alveolar has 2 meanings:

Meaning #1: pertaining to the tiny air sacs of the lungs
  Pertains to noun: alveolus (meaning #1)

Meaning #2: pertaining to the alveolar ridge
  Pertains to noun: alveolar ridge (meaning #1)