axial surfaces

ax·i·al surfaces

surfaces of a tooth parallel to its long axis; the axial surfaces are the vestibular (labial or buccal), lingual, and contact (mesial or distal).

ax·i·al sur·fac·es

(aksē-ăl sŭrfăs-ĕz)
Surfaces of a tooth parallel to its long axis; include vestibular (labial or buccal), lingual, and contact (mesial or distal).