IPA: //ˌsaɪ.əˈlæɡ.əɡ//
KK: /sɪˈæl.ə.ɡɔɡ/
A substance that helps to increase the production of saliva in the mouth.
The doctor prescribed a sialagogue to help with the patient's dry mouth.
Sialagogue → It is formed from "sialon" (Greek, meaning saliva) and "agōgos" (Greek, meaning leading or inducing). The word "sialagogue" refers to a substance that induces the production of saliva.
Think of something that 'leads' ('agōgos') to the production of 'saliva' ('sialon') — that's why a sialagogue is something that stimulates saliva flow.