morsicatio
Pronunciation: mor-sik′ă-tē-ō
Definition: Habitual nibbling of the lips (morsicatio labiorum), tongue (morsicatio linguae), or buccal mucosa (morsicatio buccarum); often produces a shaggy white lesion.
[L. biting, fr. mordeo, to bite]
Search Stedman's Medical Dictionary
Examples: glitazone, GI cocktail, etc.

