Pronunciation: (buk'ul), [key]
1. of or pertaining to the cheek.
2. pertaining to the sides of the mouth or to the mouth; oral.
3. Dentistry.directed toward the cheek. Cf. distal (def. 2), mesial (def. 2).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.