Buccal

Adjective

1. Of, relating to, near, involving, or supplying the cheek.

   "buccal surface of the molars"

2. Of, relating to, or lying in the mouth.

   "buccal cavity"

3. Administered in the mouth, not by swallowing but by absorption through the skin of the cheek; often by placing between the top gum and the inside of the lip.
4. supralaryngeal, not laryngeal or glottal.