SIALAGOGUE Meaning of SIALAGOGUE in English [ 'sʌɪələgɒg ]■ noun Medicine a drug that promotes the secretion of saliva.OriginC18: from Fr., from Gk sialon 'saliva' + agōgos 'leading'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004