Definitions:

1. Abnormal dryness of the mouth. NOUN
   • Xerostomia can be caused by a variety of factors, including medications, radiation therapy, and dehydration.
2. Dryness in the mouth, which may be associated with a change in the composition of saliva, or reduced salivary flow, or have no identifiable cause. NOUN
   • Good oral hygiene is crucial for people with xerostomia, as dry mouth increases the risk of cavities and infections.
3. Medical term for dry mouth resulting from a lack of saliva production. NOUN
   • Radiation therapy to the head and neck can often lead to xerostomia due to damage to the salivary glands.

Synonyms:

• asialism
• cotton mouth
• dry mouth
• hyposalivation