Sercial Syllabification: (Ser·cial)Pronunciation: /ˈsərsēəl, sərsˈyäl/Definition of Sercial noun a variety of wine grape grown chiefly in Madeira. a dry, light Madeira made from the Sercial grape. Origin:PortugueseSercial in other Oxford dictionaries Definition of Sercial in the British & World English dictionary