MeSH definition : The discharge of saliva from the SALIVARY GLANDS that keeps the mouth tissues moist
and aids in digestion.;
MeSH annotation : SALIVA and SALIVARY GLANDS are also available; distinguish from SALIVARY ELIMINATION,
the discharge of substances from the blood supply by diffusion into the saliva;
Wikipedia link : https://en.wikipedia.org/wiki/Salivation;