noun. abnormal dryness of the mouth resulting from decreased secretion of saliva.
1. Noun, singular or mass Your doctor will likely ask you a series of questions about your dental history and what medications you are on to help determine the exact cause of the xerostomia to properly treat it. 2. Proper noun, singular Because certain medications are the usual cause of xerostomia, your doctor may have you switch medications and see if that helps your condition. 3. Adverb There are also steps you can take on your own to help stimulate saliva production and flush bacteria out of your mouth if you experience xerostomia**.