Oligosialia is a term used in medicine to describe the condition of having a reduced amount of saliva in the mouth. The word is pronounced /ˌɒlɪɡə(ʊ)ˈsʌɪlɪə/ and is derived from the Greek roots "oligo" meaning few or little, and "sialia" meaning saliva. The correct spelling of this word can be difficult to remember due to its numerous vowels and consonants, but it is important for healthcare professionals to be able to accurately identify and diagnose conditions such as oligosialia in order to provide appropriate treatment.
Oligoptyalism, a scanty secretion of saliva.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.