• adult teeth
  • child teeth

Word Meaning
Labial The outer tooth surfaces that face the lips and cheeks. 
Laughing Gas Nitrous oxide. 
Lesion The effect of disease or injury on a part of the body.
Examples are: An ulcer or sore on a lip, or a cut on a lip. 
Lingual The inner tooth surfaces that face the tongue. 
Local Anaesthetic An injection given to eliminate pain in a specific area.