<unk>  is the medical term for an unusually large tongue. Severe enlargement of the tongue can cause cosmetic and functional difficulties in speaking, eating, swallowing and sleeping.<unk>  is uncommon, and usually occurs in children. There are many causes. Treatment depends upon the exact cause.
Macroglossia
Macrodontia 
Hypoglossia
Macrognathism
Asymmetric crying facies
Ankyloglossia
Elfin facies
Spotted lunulae