Veneer
Plastic or porcelain facing bonded directly to a tooth to improve its appearance. Also see
laminate.

Vertical Dimension
arbitrary space between upper and lower jaws upon closure; may decrease over time due to wear, shifting or damage to the teeth.

Wisdom Teeth
Third (last) molars that usually erupt at age 18-25 (when "wisdom is attained").

Xerostomia
Dry mouth or decrease in the production of saliva.